diff --git a/src/GvimExt/gvimext.h b/src/GvimExt/gvimext.h
index e17f2ac..7a4e009 100644
--- a/src/GvimExt/gvimext.h
+++ b/src/GvimExt/gvimext.h
@@ -31,7 +31,7 @@
 # define STRICT
 #endif
 
-#define INC_OLE2	// WIN32, get ole2 from windows.h
+#define INC_OLE2	// MS-Windows, get ole2 from windows.h
 
 /* Visual Studio 2005 has 'deprecated' many of the standard CRT functions */
 #if defined(_MSC_VER) && _MSC_VER >= 1400
diff --git a/src/Make_bc5.mak b/src/Make_bc5.mak
index 30fe727..04f7885 100644
--- a/src/Make_bc5.mak
+++ b/src/Make_bc5.mak
@@ -405,7 +405,7 @@
 !endif
 
 !if ("$(GUI)"=="yes")
-DEFINES = $(DEFINES) -DFEAT_GUI_W32 -DFEAT_CLIPBOARD
+DEFINES = $(DEFINES) -DFEAT_GUI -DFEAT_CLIPBOARD
 !if ("$(DEBUG)"=="yes")
 TARGET = gvimd.exe
 !else
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index f6ae853..06bf07a 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -491,7 +491,7 @@
 
 # See feature.h for a list of options.
 # Any other defines can be included here.
-DEF_GUI=-DFEAT_GUI_W32 -DFEAT_CLIPBOARD
+DEF_GUI=-DFEAT_GUI -DFEAT_CLIPBOARD
 DEFINES=-DWIN32 -DWINVER=$(WINVER) -D_WIN32_WINNT=$(WINVER) \
 	-DHAVE_PATHDEF -DFEAT_$(FEATURES) -DHAVE_STDINT_H
 ifeq ($(ARCH),x86-64)
diff --git a/src/Make_ivc.mak b/src/Make_ivc.mak
index 26367e0..02910bc 100644
--- a/src/Make_ivc.mak
+++ b/src/Make_ivc.mak
@@ -92,8 +92,8 @@
 # ADD LINK32  oldnames.lib kernel32.lib user32.lib gdi32.lib version.lib comdlg32.lib comctl32.lib advapi32.lib shell32.lib ole32.lib uuid.lib /nologo /machine:I386 /nodefaultlib
 # SUBTRACT LINK32 /incremental:yes
 
-RSC_PROJ= /l 0x409 /d "FEAT_GUI_W32"
-# ADD RSC /l 0x409 /d "FEAT_GUI_W32"
+RSC_PROJ= /l 0x409 /d "FEAT_GUI"
+# ADD RSC /l 0x409 /d "FEAT_GUI"
 
 !IF  "$(CFG)" == "Vim - Win32 Release gvim OLE"
 
@@ -105,8 +105,8 @@
 VIM=gvim
 EXTRAS="$(INTDIR)/if_ole.obj" "$(INTDIR)/vim.res" "$(INTDIR)/gui.obj" "$(INTDIR)/gui_w32.obj" "$(INTDIR)/gui_beval.obj" "$(INTDIR)/os_w32exe.obj"
 
-CPP_PROJ=$(CPP_PROJ) /Zi /O2 /D "NDEBUG" /D "FEAT_GUI_W32" /D "DYNAMIC_GETTEXT" /D "FEAT_OLE" /Fd.\oleRel/ /Fo.\oleRel/
-# ADD CPP            /Zi /O2 /D "NDEBUG" /D "FEAT_GUI_W32" /D "DYNAMIC_GETTEXT" /D "FEAT_OLE" /Fd.\oleRel/ /Fo.\oleRel/
+CPP_PROJ=$(CPP_PROJ) /Zi /O2 /D "NDEBUG" /D "FEAT_GUI" /D "DYNAMIC_GETTEXT" /D "FEAT_OLE" /Fd.\oleRel/ /Fo.\oleRel/
+# ADD CPP            /Zi /O2 /D "NDEBUG" /D "FEAT_GUI" /D "DYNAMIC_GETTEXT" /D "FEAT_OLE" /Fd.\oleRel/ /Fo.\oleRel/
 
 RSC_PROJ=$(RSC_PROJ) /I ".\oleRel" /d "NDEBUG" /d "FEAT_OLE" /fo.\oleRel\vim.res
 # ADD RSC            /I ".\oleRel" /d "NDEBUG" /d "FEAT_OLE" /fo.\oleRel\vim.res
@@ -124,8 +124,8 @@
 VIM=gvimd
 EXTRAS="$(INTDIR)/if_ole.obj" "$(INTDIR)/vim.res" "$(INTDIR)/gui.obj" "$(INTDIR)/gui_w32.obj" "$(INTDIR)/gui_beval.obj" "$(INTDIR)/os_w32exe.obj"
 
-CPP_PROJ=$(CPP_PROJ) /Zi /Od /D "_DEBUG" /D "FEAT_GUI_W32" /D "DYNAMIC_GETTEXT" /D "FEAT_OLE" /Fd.\oleDbg/ /Fo.\oleDbg/
-# ADD CPP            /Zi /Od /D "_DEBUG" /D "FEAT_GUI_W32" /D "DYNAMIC_GETTEXT" /D "FEAT_OLE" /Fd.\oleDbg/ /Fo.\oleDbg/
+CPP_PROJ=$(CPP_PROJ) /Zi /Od /D "_DEBUG" /D "FEAT_GUI" /D "DYNAMIC_GETTEXT" /D "FEAT_OLE" /Fd.\oleDbg/ /Fo.\oleDbg/
+# ADD CPP            /Zi /Od /D "_DEBUG" /D "FEAT_GUI" /D "DYNAMIC_GETTEXT" /D "FEAT_OLE" /Fd.\oleDbg/ /Fo.\oleDbg/
 
 RSC_PROJ=$(RSC_PROJ) /I .\oleDbg /d "_DEBUG" /d "FEAT_OLE" /fo.\oleDbg\vim.res
 # ADD RSC            /I .\oleDbg /d "_DEBUG" /d "FEAT_OLE" /fo.\oleDbg\vim.res
@@ -144,8 +144,8 @@
 VIM=gvim
 EXTRAS="$(INTDIR)/vim.res" "$(INTDIR)/gui.obj" "$(INTDIR)/gui_w32.obj" "$(INTDIR)/gui_beval.obj" "$(INTDIR)/os_w32exe.obj"
 
-CPP_PROJ=$(CPP_PROJ) /Zi /O2 /D "NDEBUG" /D "FEAT_GUI_W32" /Fd.\gRel/ /Fo.\gRel/
-# ADD CPP            /Zi /O2 /D "NDEBUG" /D "FEAT_GUI_W32" /Fd.\gRel/ /Fo.\gRel/
+CPP_PROJ=$(CPP_PROJ) /Zi /O2 /D "NDEBUG" /D "FEAT_GUI" /Fd.\gRel/ /Fo.\gRel/
+# ADD CPP            /Zi /O2 /D "NDEBUG" /D "FEAT_GUI" /Fd.\gRel/ /Fo.\gRel/
 
 RSC_PROJ=$(RSC_PROJ) /d "NDEBUG" /fo.\gRel\vim.res
 # ADD RSC            /d "NDEBUG" /fo.\gRel\vim.res
@@ -163,8 +163,8 @@
 VIM=gvimd
 EXTRAS="$(INTDIR)/vim.res" "$(INTDIR)/gui.obj" "$(INTDIR)/gui_w32.obj" "$(INTDIR)/gui_beval.obj" "$(INTDIR)/os_w32exe.obj"
 
-CPP_PROJ=$(CPP_PROJ) /Zi /Od /D "_DEBUG" /D "FEAT_GUI_W32" /Fd.\gDbg/ /Fo.\gDbg/
-# ADD CPP            /Zi /Od /D "_DEBUG" /D "FEAT_GUI_W32" /Fd.\gDbg/ /Fo.\gDbg/
+CPP_PROJ=$(CPP_PROJ) /Zi /Od /D "_DEBUG" /D "FEAT_GUI" /Fd.\gDbg/ /Fo.\gDbg/
+# ADD CPP            /Zi /Od /D "_DEBUG" /D "FEAT_GUI" /Fd.\gDbg/ /Fo.\gDbg/
 
 RSC_PROJ=$(RSC_PROJ) /d "_DEBUG" /fo.\gDbg\vim.res
 # ADD RSC            /d "_DEBUG" /fo.\gDbg\vim.res
@@ -508,7 +508,7 @@
 # Begin Custom Build
 
 "$(INTDIR)\if_ole.obj" : $(SOURCE) "$(INTDIR)" "$(INTDIR)\if_ole.h"
- cl.exe /nologo /MT /W3 /GX /I ".\proto" /D "WIN32" /c /Zi /O2 /D "NDEBUG" /D "FEAT_GUI_W32" /D "FEAT_OLE" /Fd.\oleRel/ /Fo.\oleRel/ /I ".\oleRel" .\if_ole.cpp
+ cl.exe /nologo /MT /W3 /GX /I ".\proto" /D "WIN32" /c /Zi /O2 /D "NDEBUG" /D "FEAT_GUI" /D "FEAT_OLE" /Fd.\oleRel/ /Fo.\oleRel/ /I ".\oleRel" .\if_ole.cpp
  @rem This is the default rule with /I "$(IntDir)" added
 
 # End Custom Build
@@ -519,7 +519,7 @@
 # Begin Custom Build
 
 "$(INTDIR)\if_ole.obj" : $(SOURCE) "$(INTDIR)" "$(INTDIR)\if_ole.h"
- cl.exe /nologo /MT /W3 /GX /I ".\proto" /D "WIN32" /c /Zi /Od /D "_DEBUG" /D "FEAT_GUI_W32" /D "FEAT_OLE" /Fd.\oleDbg/ /Fo.\oleDbg/ /I ".\oleDbg" .\if_ole.cpp
+ cl.exe /nologo /MT /W3 /GX /I ".\proto" /D "WIN32" /c /Zi /Od /D "_DEBUG" /D "FEAT_GUI" /D "FEAT_OLE" /Fd.\oleDbg/ /Fo.\oleDbg/ /I ".\oleDbg" .\if_ole.cpp
  @rem This is the default rule with /I "$(IntDir)" added
 
 # End Custom Build
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index c81fbd2..391277f 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -791,8 +791,8 @@
 
 !if "$(GUI)" == "yes"
 SUBSYSTEM = windows
-CFLAGS = $(CFLAGS) -DFEAT_GUI_W32
-RCFLAGS = $(RCFLAGS) -DFEAT_GUI_W32
+CFLAGS = $(CFLAGS) -DFEAT_GUI
+RCFLAGS = $(RCFLAGS) -DFEAT_GUI
 VIM = g$(VIM)
 GUI_INCL = \
 	gui.h
diff --git a/src/beval.h b/src/beval.h
index 21900c5..090c5fb 100644
--- a/src/beval.h
+++ b/src/beval.h
@@ -43,7 +43,7 @@
     int			y;
     unsigned int	state;		/* Button/Modifier key state */
 # else
-#  if !defined(FEAT_GUI_W32)
+#  if !defined(FEAT_GUI_MSWIN)
     Widget		target;		/* widget we are monitoring */
     Widget		balloonShell;
     Widget		balloonLabel;
@@ -63,7 +63,7 @@
     BeState		showState;	/* tells us whats currently going on */
 #  endif
 # endif
-# if !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_W32)
+# if !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MSWIN)
     Dimension		screen_width;	/* screen width in pixels */
     Dimension		screen_height;	/* screen height in pixels */
 # endif
@@ -76,7 +76,7 @@
     int			*vts;		// vartabstop setting for this buffer
 #endif
     char_u		*msg;
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
     void		*tofree;
 #endif
 } BalloonEval;
diff --git a/src/blowfish.c b/src/blowfish.c
index 8ca0e28..7bc3e31 100644
--- a/src/blowfish.c
+++ b/src/blowfish.c
@@ -34,7 +34,7 @@
     char_u   uc[8];
 } block8;
 
-#if defined(WIN3264)
+#if defined(MSWIN)
   /* MS-Windows is always little endian */
 #else
 # ifdef HAVE_CONFIG_H
diff --git a/src/channel.c b/src/channel.c
index d728c77..57bb4cc 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -20,7 +20,7 @@
 #endif
 
 /* Note: when making changes here also adjust configure.ac. */
-#ifdef WIN32
+#ifdef MSWIN
 /* WinSock API is separated from C API, thus we can't use read(), write(),
  * errno... */
 # define SOCK_ERRNO errno = WSAGetLastError()
@@ -65,7 +65,7 @@
 
 static char *part_names[] = {"sock", "out", "err", "in"};
 
-#ifdef WIN32
+#ifdef MSWIN
     static int
 fd_read(sock_T fd, char *buf, size_t len)
 {
@@ -234,7 +234,7 @@
     }
 }
 
-#ifdef _WIN32
+#ifdef MSWIN
 # undef PERROR
 # define PERROR(msg) (void)semsg("%s: %s", msg, strerror_win32(errno))
 
@@ -687,7 +687,7 @@
     int			sd = -1;
     struct sockaddr_in	server;
     struct hostent	*host;
-#ifdef WIN32
+#ifdef MSWIN
     u_short		port = port_in;
     u_long		val = 1;
 #else
@@ -696,7 +696,7 @@
     channel_T		*channel;
     int			ret;
 
-#ifdef WIN32
+#ifdef MSWIN
     channel_init_winsock();
 #endif
 
@@ -758,7 +758,7 @@
 	{
 	    /* Make connect() non-blocking. */
 	    if (
-#ifdef _WIN32
+#ifdef MSWIN
 		ioctlsocket(sd, FIONBIO, &val) < 0
 #else
 		fcntl(sd, F_SETFL, O_NONBLOCK) < 0
@@ -804,14 +804,14 @@
 
 	/* If connect() didn't finish then try using select() to wait for the
 	 * connection to be made. For Win32 always use select() to wait. */
-#ifndef WIN32
+#ifndef MSWIN
 	if (errno != ECONNREFUSED)
 #endif
 	{
 	    struct timeval	tv;
 	    fd_set		rfds;
 	    fd_set		wfds;
-#ifndef WIN32
+#ifndef MSWIN
 	    int			so_error = 0;
 	    socklen_t		so_error_len = sizeof(so_error);
 	    struct timeval	start_tv;
@@ -824,7 +824,7 @@
 
 	    tv.tv_sec = waitnow / 1000;
 	    tv.tv_usec = (waitnow % 1000) * 1000;
-#ifndef WIN32
+#ifndef MSWIN
 	    gettimeofday(&start_tv, NULL);
 #endif
 	    ch_log(channel,
@@ -842,7 +842,7 @@
 		return NULL;
 	    }
 
-#ifdef WIN32
+#ifdef MSWIN
 	    /* On Win32: select() is expected to work and wait for up to
 	     * "waitnow" msec for the socket to be open. */
 	    if (FD_ISSET(sd, &wfds))
@@ -893,7 +893,7 @@
 #endif
 	}
 
-#ifndef WIN32
+#ifndef MSWIN
 	if (waittime > 1 && elapsed_msec < waittime)
 	{
 	    /* The port isn't ready but we also didn't get an error.
@@ -930,7 +930,7 @@
 
     if (waittime >= 0)
     {
-#ifdef _WIN32
+#ifdef MSWIN
 	val = 0;
 	ioctlsocket(sd, FIONBIO, &val);
 #else
@@ -1029,7 +1029,7 @@
 		    && (part == PART_OUT || channel->CH_OUT_FD != *fd)
 		    && (part == PART_ERR || channel->CH_ERR_FD != *fd))
 	    {
-#ifdef WIN32
+#ifdef MSWIN
 		if (channel->ch_named_pipe)
 		    DisconnectNamedPipe((HANDLE)fd);
 #endif
@@ -1427,7 +1427,7 @@
 	in_part->ch_block_write = 1;
 
     /* TODO: Win32 implementation, probably using WaitForMultipleObjects() */
-#ifndef WIN32
+#ifndef MSWIN
     {
 # if defined(HAVE_SELECT)
 	struct timeval	tval;
@@ -1759,7 +1759,7 @@
     {
 	if (*p == NUL)
 	    *p = NL;
-#ifdef WIN32
+#ifdef MSWIN
 	else if (*p == 0x1b)
 	{
 	    // crush the escape sequence OSC 0/1/2: ESC ]0;
@@ -2064,7 +2064,7 @@
 		    (int)buflen);
 	    reader.js_used = 0;
 	    chanpart->ch_wait_len = buflen;
-#ifdef WIN32
+#ifdef MSWIN
 	    chanpart->ch_deadline = GetTickCount() + 100L;
 #else
 	    gettimeofday(&chanpart->ch_deadline, NULL);
@@ -2079,7 +2079,7 @@
 	else
 	{
 	    int timeout;
-#ifdef WIN32
+#ifdef MSWIN
 	    timeout = GetTickCount() > chanpart->ch_deadline;
 #else
 	    {
@@ -3198,7 +3198,7 @@
     if (timeout > 0)
 	ch_log(channel, "Waiting for up to %d msec", timeout);
 
-# ifdef WIN32
+# ifdef MSWIN
     if (fd != channel->CH_SOCK_FD)
     {
 	DWORD	nread;
@@ -3554,7 +3554,7 @@
 	    timeout = timeout_arg;
 	    if (chanpart->ch_wait_len > 0)
 	    {
-#ifdef WIN32
+#ifdef MSWIN
 		timeout = chanpart->ch_deadline - GetTickCount() + 1;
 #else
 		{
@@ -3680,7 +3680,7 @@
     free_job_options(&opt);
 }
 
-# if defined(WIN32) || defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK) \
+# if defined(MSWIN) || defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK) \
 	|| defined(PROTO)
 /*
  * Lookup the channel from the socket.  Set "partp" to the fd index.
@@ -3707,7 +3707,7 @@
 }
 # endif
 
-# if defined(WIN32) || defined(FEAT_GUI) || defined(PROTO)
+# if defined(MSWIN) || defined(FEAT_GUI) || defined(PROTO)
 /*
  * Check the channels for anything that is ready to be read.
  * The data is put in the read queue.
@@ -3772,7 +3772,7 @@
 
     if (fd != INVALID_FD)
     {
-#ifdef _WIN32
+#ifdef MSWIN
 	u_long	val = 1;
 
 	ioctlsocket(fd, FIONBIO, &val);
@@ -3853,7 +3853,7 @@
 	else
 	{
 	    res = fd_write(fd, (char *)buf, len);
-#ifdef WIN32
+#ifdef MSWIN
 	    if (channel->ch_named_pipe && res < 0)
 	    {
 		DisconnectNamedPipe((HANDLE)fd);
@@ -4213,7 +4213,7 @@
 }
 # endif /* UNIX && !HAVE_SELECT */
 
-# if (!defined(WIN32) && defined(HAVE_SELECT)) || defined(PROTO)
+# if (!defined(MSWIN) && defined(HAVE_SELECT)) || defined(PROTO)
 
 /*
  * The "fd_set" type is hidden to avoid problems with the function proto.
@@ -4313,7 +4313,7 @@
 
     return ret;
 }
-# endif /* !WIN32 && HAVE_SELECT */
+# endif /* !MSWIN && HAVE_SELECT */
 
 /*
  * Execute queued up commands.
@@ -5039,7 +5039,7 @@
 		    break;
 		opt->jo_cwd = tv_get_string_buf_chk(item, opt->jo_cwd_buf);
 		if (opt->jo_cwd == NULL || !mch_isdir(opt->jo_cwd)
-#ifndef WIN32  // Win32 directories don't have the concept of "executable"
+#ifndef MSWIN  // Win32 directories don't have the concept of "executable"
 				|| mch_access((char *)opt->jo_cwd, X_OK) != 0
 #endif
 				)
@@ -5199,7 +5199,7 @@
 #ifdef UNIX
     vim_free(job->jv_termsig);
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
     vim_free(job->jv_tty_type);
 #endif
     free_callback(job->jv_exit_cb, job->jv_exit_partial);
@@ -5971,7 +5971,7 @@
 #ifdef UNIX
     dict_add_string(dict, "termsig", job->jv_termsig);
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
     dict_add_string(dict, "tty_type", job->jv_tty_type);
 #endif
 
diff --git a/src/edit.c b/src/edit.c
index 62ff03d..2f81b52 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -1247,9 +1247,9 @@
 	    did_cursorhold = TRUE;
 	    break;
 
-#ifdef FEAT_GUI_W32
-	    /* On Win32 ignore <M-F4>, we get it when closing the window was
-	     * cancelled. */
+#ifdef FEAT_GUI_MSWIN
+	    /* On MS-Windows ignore <M-F4>, we get it when closing the window
+	     * was cancelled. */
 	case K_F4:
 	    if (mod_mask != MOD_MASK_ALT)
 		goto normalchar;
diff --git a/src/eval.c b/src/eval.c
index 56a26b1..f66d296 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -7460,7 +7460,7 @@
 # ifdef UNIX
 		vim_snprintf((char *)buf, NUMBUFLEN,
 			    "process %ld %s", (long)job->jv_pid, status);
-# elif defined(WIN32)
+# elif defined(MSWIN)
 		vim_snprintf((char *)buf, NUMBUFLEN,
 			    "process %ld %s",
 			    (long)job->jv_proc_info.dwProcessId,
@@ -9956,7 +9956,7 @@
 
 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
 
-#ifdef WIN3264
+#ifdef MSWIN
 /*
  * Functions for ":8" filename modifier: get 8.3 version of a filename.
  */
@@ -10191,7 +10191,7 @@
 
     return OK;
 }
-#endif /* WIN3264 */
+#endif // MSWIN
 
 /*
  * Adjust a filename, according to a string of modifiers.
@@ -10215,7 +10215,7 @@
     char_u	dirname[MAXPATHL];
     int		c;
     int		has_fullname = 0;
-#ifdef WIN3264
+#ifdef MSWIN
     char_u	*fname_start = *fnamep;
     int		has_shortname = 0;
 #endif
@@ -10270,7 +10270,7 @@
 		return -1;
 	}
 
-#ifdef WIN3264
+#ifdef MSWIN
 # if _WIN32_WINNT >= 0x0500
 	if (vim_strchr(*fnamep, '~') != NULL)
 	{
@@ -10313,7 +10313,7 @@
 	*usedlen += 2;
 	if (c == '8')
 	{
-#ifdef WIN3264
+#ifdef MSWIN
 	    has_shortname = 1; /* Postpone this. */
 #endif
 	    continue;
@@ -10406,12 +10406,12 @@
     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
     {
 	*usedlen += 2;
-#ifdef WIN3264
+#ifdef MSWIN
 	has_shortname = 1;
 #endif
     }
 
-#ifdef WIN3264
+#ifdef MSWIN
     /*
      * Handle ":8" after we have done 'heads' and before we do 'tails'.
      */
@@ -10455,7 +10455,7 @@
 	    *fnamelen = l;
 	}
     }
-#endif /* WIN3264 */
+#endif // MSWIN
 
     /* ":t" - tail, just the basename */
     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
diff --git a/src/evalfunc.c b/src/evalfunc.c
index e9f6342..e94d875 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -123,7 +123,7 @@
 static void f_count(typval_T *argvars, typval_T *rettv);
 static void f_cscope_connection(typval_T *argvars, typval_T *rettv);
 static void f_cursor(typval_T *argsvars, typval_T *rettv);
-#ifdef WIN3264
+#ifdef MSWIN
 static void f_debugbreak(typval_T *argvars, typval_T *rettv);
 #endif
 static void f_deepcopy(typval_T *argvars, typval_T *rettv);
@@ -599,7 +599,7 @@
     {"count",		2, 4, f_count},
     {"cscope_connection",0,3, f_cscope_connection},
     {"cursor",		1, 3, f_cursor},
-#ifdef WIN3264
+#ifdef MSWIN
     {"debugbreak",	1, 1, f_debugbreak},
 #endif
     {"deepcopy",	1, 2, f_deepcopy},
@@ -2884,7 +2884,7 @@
     rettv->vval.v_number = 0;
 }
 
-#ifdef WIN3264
+#ifdef MSWIN
 /*
  * "debugbreak()" function
  */
@@ -4137,7 +4137,7 @@
     if (gui.in_use)
 	gui_mch_set_foreground();
 #else
-# ifdef WIN32
+# ifdef MSWIN
     win32_set_foreground();
 # endif
 #endif
@@ -6152,7 +6152,7 @@
 #ifdef VMS
 	"vms",
 #endif
-#ifdef WIN32
+#ifdef MSWIN
 	"win32",
 #endif
 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
@@ -6182,7 +6182,7 @@
 #endif
 #ifdef FEAT_BEVAL_GUI
 	"balloon_eval",
-# ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
+# ifndef FEAT_GUI_MSWIN /* other GUIs always have multiline balloons */
 	"balloon_multiline",
 # endif
 #endif
@@ -6196,7 +6196,7 @@
 # endif
 #endif
 #if defined(FEAT_BROWSE) && (defined(USE_FILE_CHOOSER) \
-	|| defined(FEAT_GUI_W32) \
+	|| defined(FEAT_GUI_MSWIN) \
 	|| defined(FEAT_GUI_MOTIF))
 	"browsefilter",
 #endif
@@ -6322,7 +6322,7 @@
 #ifdef FEAT_GUI_PHOTON
 	"gui_photon",
 #endif
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 	"gui_win32",
 #endif
 #ifdef FEAT_HANGULIN
@@ -6526,7 +6526,7 @@
 #ifdef FEAT_TERMGUICOLORS
 	"termguicolors",
 #endif
-#if defined(FEAT_TERMINAL) && !defined(WIN3264)
+#if defined(FEAT_TERMINAL) && !defined(MSWIN)
 	"terminal",
 #endif
 #ifdef TERMINFO
@@ -6658,7 +6658,7 @@
 	    n = stdout_isatty;
 	else if (STRICMP(name, "multi_byte_encoding") == 0)
 	    n = has_mbyte;
-#if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
+#if defined(FEAT_BEVAL) && defined(FEAT_GUI_MSWIN)
 	else if (STRICMP(name, "balloon_multiline") == 0)
 	    n = multiline_balloon_available();
 #endif
@@ -6731,11 +6731,11 @@
 	else if (STRICMP(name, "netbeans_enabled") == 0)
 	    n = netbeans_active();
 #endif
-#if defined(FEAT_TERMINAL) && defined(WIN3264)
+#if defined(FEAT_TERMINAL) && defined(MSWIN)
 	else if (STRICMP(name, "terminal") == 0)
 	    n = terminal_enabled();
 #endif
-#if defined(FEAT_TERMINAL) && defined(WIN3264)
+#if defined(FEAT_TERMINAL) && defined(MSWIN)
 	else if (STRICMP(name, "conpty") == 0)
 	    n = use_conpty();
 #endif
@@ -9309,7 +9309,7 @@
 	return FAIL;
     n1 = list_find_nr(arg->vval.v_list, 0L, &error);
     n2 = list_find_nr(arg->vval.v_list, 1L, &error);
-# ifdef WIN3264
+# ifdef MSWIN
     tm->HighPart = n1;
     tm->LowPart = n2;
 # else
@@ -9354,7 +9354,7 @@
     {
 	long	n1, n2;
 
-# ifdef WIN3264
+# ifdef MSWIN
 	n1 = res.HighPart;
 	n2 = res.LowPart;
 # else
@@ -9443,7 +9443,7 @@
     char_u	*r = NULL;
     char_u	buf[NUMBUFLEN];
     int		timeout = 0;
-# ifdef WIN32
+# ifdef MSWIN
     HWND	w;
 # else
     Window	w;
@@ -9464,7 +9464,7 @@
     if (server_name == NULL)
 	return;		/* type error; errmsg already given */
     keys = tv_get_string_buf(&argvars[1], buf);
-# ifdef WIN32
+# ifdef MSWIN
     if (serverSendToVim(server_name, keys, &r, &w, expr, timeout, TRUE) < 0)
 # else
     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, timeout,
@@ -9522,7 +9522,7 @@
 f_remote_foreground(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
 {
 #ifdef FEAT_CLIENTSERVER
-# ifdef WIN32
+# ifdef MSWIN
     /* On Win32 it's done in this application. */
     {
 	char_u	*server_name = tv_get_string_chk(&argvars[0]);
@@ -9549,7 +9549,7 @@
 #ifdef FEAT_CLIENTSERVER
     dictitem_T	v;
     char_u	*s = NULL;
-# ifdef WIN32
+# ifdef MSWIN
     long_u	n = 0;
 # endif
     char_u	*serverid;
@@ -9565,7 +9565,7 @@
 	rettv->vval.v_number = -1;
 	return;		/* type error; errmsg already given */
     }
-# ifdef WIN32
+# ifdef MSWIN
     sscanf((const char *)serverid, SCANF_HEX_LONG_U, &n);
     if (n == 0)
 	rettv->vval.v_number = -1;
@@ -9609,7 +9609,7 @@
     if (serverid != NULL && !check_restricted() && !check_secure())
     {
 	int timeout = 0;
-# ifdef WIN32
+# ifdef MSWIN
 	/* The server's HWND is encoded in the 'id' parameter */
 	long_u		n = 0;
 # endif
@@ -9617,7 +9617,7 @@
 	if (argvars[1].v_type != VAR_UNKNOWN)
 	    timeout = tv_get_number(&argvars[1]);
 
-# ifdef WIN32
+# ifdef MSWIN
 	sscanf((char *)serverid, SCANF_HEX_LONG_U, &n);
 	if (n != 0)
 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE, timeout);
@@ -10789,7 +10789,7 @@
     char_u	*r = NULL;
 
 #ifdef FEAT_CLIENTSERVER
-# ifdef WIN32
+# ifdef MSWIN
     r = serverGetVimNames();
 # else
     make_connection();
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 79b9bc1..da10c12 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -1618,7 +1618,7 @@
 	 */
 #ifndef FEAT_GUI_MSWIN
 	if (cmd == NULL
-# ifdef WIN3264
+# ifdef MSWIN
 		|| (winstart && !need_wait_return)
 # endif
 	   )
@@ -1643,7 +1643,7 @@
 # endif
 	    no_wait_return = save_nwr;
 	}
-#endif /* FEAT_GUI_W32 */
+#endif /* FEAT_GUI_MSWIN */
 
 #ifdef MSWIN
 	if (!winstart) /* if winstart==TRUE, never stopped termcap! */
@@ -1935,7 +1935,7 @@
     int		shortname = FALSE;	/* use 8.3 file name */
     stat_T	st_old;		/* mch_stat() of existing viminfo file */
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
     int		hidden = FALSE;
 #endif
 
@@ -1999,7 +1999,7 @@
 	    goto end;
 	}
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
 	/* Get the file attributes of the existing viminfo file. */
 	hidden = mch_ishidden(fname);
 #endif
@@ -2195,7 +2195,7 @@
 		++viminfo_errcnt;
 		semsg(_("E886: Can't rename viminfo file to %s!"), fname);
 	    }
-# ifdef WIN3264
+# ifdef MSWIN
 	    /* If the viminfo file was hidden then also hide the new file. */
 	    else if (hidden)
 		mch_hide(fname);
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 4bf2072..5418804 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -1048,7 +1048,7 @@
     void
 profile_start(proftime_T *tm)
 {
-# ifdef WIN3264
+# ifdef MSWIN
     QueryPerformanceCounter(tm);
 # else
     gettimeofday(tm, NULL);
@@ -1063,7 +1063,7 @@
 {
     proftime_T now;
 
-# ifdef WIN3264
+# ifdef MSWIN
     QueryPerformanceCounter(&now);
     tm->QuadPart = now.QuadPart - tm->QuadPart;
 # else
@@ -1084,7 +1084,7 @@
     void
 profile_sub(proftime_T *tm, proftime_T *tm2)
 {
-# ifdef WIN3264
+# ifdef MSWIN
     tm->QuadPart -= tm2->QuadPart;
 # else
     tm->tv_usec -= tm2->tv_usec;
@@ -1106,7 +1106,7 @@
 {
     static char buf[50];
 
-# ifdef WIN3264
+# ifdef MSWIN
     LARGE_INTEGER   fr;
 
     QueryPerformanceFrequency(&fr);
@@ -1124,7 +1124,7 @@
     float_T
 profile_float(proftime_T *tm)
 {
-#  ifdef WIN3264
+#  ifdef MSWIN
     LARGE_INTEGER   fr;
 
     QueryPerformanceFrequency(&fr);
@@ -1145,7 +1145,7 @@
 	profile_zero(tm);
     else
     {
-# ifdef WIN3264
+# ifdef MSWIN
 	LARGE_INTEGER   fr;
 
 	QueryPerformanceCounter(tm);
@@ -1170,7 +1170,7 @@
 {
     proftime_T	now;
 
-# ifdef WIN3264
+# ifdef MSWIN
     if (tm->QuadPart == 0)  /* timer was not set */
 	return FALSE;
     QueryPerformanceCounter(&now);
@@ -1190,7 +1190,7 @@
     void
 profile_zero(proftime_T *tm)
 {
-# ifdef WIN3264
+# ifdef MSWIN
     tm->QuadPart = 0;
 # else
     tm->tv_usec = 0;
@@ -1207,7 +1207,7 @@
     long
 proftime_time_left(proftime_T *due, proftime_T *now)
 {
-#  ifdef WIN3264
+#  ifdef MSWIN
     LARGE_INTEGER fr;
 
     if (now->QuadPart > due->QuadPart)
@@ -1592,7 +1592,7 @@
 	profile_zero(tm2);
     else
     {
-# ifdef WIN3264
+# ifdef MSWIN
 	tm2->QuadPart = tm->QuadPart / count;
 # else
 	double usec = (tm->tv_sec * 1000000.0 + tm->tv_usec) / count;
@@ -1617,7 +1617,7 @@
     void
 profile_add(proftime_T *tm, proftime_T *tm2)
 {
-# ifdef WIN3264
+# ifdef MSWIN
     tm->QuadPart += tm2->QuadPart;
 # else
     tm->tv_usec += tm2->tv_usec;
@@ -1638,7 +1638,7 @@
 {
     /* Check that the result won't be negative.  Can happen with recursive
      * calls. */
-#ifdef WIN3264
+#ifdef MSWIN
     if (total->QuadPart <= children->QuadPart)
 	return;
 #else
@@ -1678,7 +1678,7 @@
     int
 profile_equal(proftime_T *tm1, proftime_T *tm2)
 {
-# ifdef WIN3264
+# ifdef MSWIN
     return (tm1->QuadPart == tm2->QuadPart);
 # else
     return (tm1->tv_usec == tm2->tv_usec && tm1->tv_sec == tm2->tv_sec);
@@ -1691,7 +1691,7 @@
     int
 profile_cmp(const proftime_T *tm1, const proftime_T *tm2)
 {
-# ifdef WIN3264
+# ifdef MSWIN
     return (int)(tm2->QuadPart - tm1->QuadPart);
 # else
     if (tm1->tv_sec == tm2->tv_sec)
@@ -4286,7 +4286,7 @@
 
 static char_u *get_one_sourceline(struct source_cookie *sp);
 
-#if (defined(WIN32) && defined(FEAT_CSCOPE)) || defined(HAVE_FD_CLOEXEC)
+#if (defined(MSWIN) && defined(FEAT_CSCOPE)) || defined(HAVE_FD_CLOEXEC)
 # define USE_FOPEN_NOINH
 /*
  * Special function to open a file without handle inheritance.
@@ -4295,7 +4295,7 @@
     static FILE *
 fopen_noinh_readbin(char *filename)
 {
-# ifdef WIN32
+# ifdef MSWIN
     int	fd_tmp = mch_open(filename, O_RDONLY | O_BINARY | O_NOINHERIT, 0);
 # else
     int	fd_tmp = mch_open(filename, O_RDONLY, 0);
@@ -5201,7 +5201,7 @@
     /* Obtain the locale value from the libraries. */
     loc = (char_u *)setlocale(what, NULL);
 
-# ifdef WIN32
+# ifdef MSWIN
     if (loc != NULL)
     {
 	char_u	*p;
@@ -5230,7 +5230,7 @@
 #endif
 
 
-#ifdef WIN32
+#ifdef MSWIN
 /*
  * On MS-Windows locale names are strings like "German_Germany.1252", but
  * gettext expects "de".  Try to translate one into another here for a few
@@ -5307,7 +5307,7 @@
 	    p = mch_getenv((char_u *)"LANG");
     }
 # endif
-# ifdef WIN32
+# ifdef MSWIN
     p = gettext_lang(p);
 # endif
     return is_valid_mess_lang(p) ? p : NULL;
@@ -5479,7 +5479,7 @@
 
 		    /* Clear $LANGUAGE because GNU gettext uses it. */
 		    vim_setenv((char_u *)"LANGUAGE", (char_u *)"");
-# ifdef WIN32
+# ifdef MSWIN
 		    /* Apparently MS-Windows printf() may cause a crash when
 		     * we give it 8-bit text while it's expecting text in the
 		     * current locale.  This call avoids that. */
@@ -5489,7 +5489,7 @@
 		if (what != LC_CTYPE)
 		{
 		    char_u	*mname;
-#ifdef WIN32
+#ifdef MSWIN
 		    mname = gettext_lang(name);
 #else
 		    mname = name;
@@ -5516,7 +5516,7 @@
 
 static char_u	**locales = NULL;	/* Array of all available locales */
 
-#  ifndef WIN32
+#  ifndef MSWIN
 static int	did_init_locales = FALSE;
 
 /* Return an array of strings for all available locales + NULL for the
@@ -5567,7 +5567,7 @@
     static void
 init_locales(void)
 {
-#  ifndef WIN32
+#  ifndef MSWIN
     if (!did_init_locales)
     {
 	did_init_locales = TRUE;
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 8cdb046..6e61cca 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -177,7 +177,7 @@
 # define ex_gui			ex_nogui
 static void	ex_nogui(exarg_T *eap);
 #endif
-#if defined(FEAT_GUI_W32) && defined(FEAT_MENU) && defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) && defined(FEAT_MENU) && defined(FEAT_TEAROFF)
 static void	ex_tearoff(exarg_T *eap);
 #else
 # define ex_tearoff		ex_ni
@@ -8866,7 +8866,7 @@
 }
 #endif
 
-#if defined(FEAT_GUI_W32) && defined(FEAT_MENU) && defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) && defined(FEAT_MENU) && defined(FEAT_TEAROFF)
     static void
 ex_tearoff(exarg_T *eap)
 {
@@ -9853,7 +9853,7 @@
     if (need_maketitle)
 	maketitle();
 #endif
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
     resize_console_buf();
 #endif
     RedrawingDisabled = r;
diff --git a/src/ex_getln.c b/src/ex_getln.c
index 0096737..3d38d2c 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -1899,9 +1899,9 @@
 		/* Ignore mouse event or open_cmdwin() result. */
 		goto cmdline_not_changed;
 
-#ifdef FEAT_GUI_W32
-	    /* On Win32 ignore <M-F4>, we get it when closing the window was
-	     * cancelled. */
+#ifdef FEAT_GUI_MSWIN
+	    /* On MS-Windows ignore <M-F4>, we get it when closing the window
+	     * was cancelled. */
 	case K_F4:
 	    if (mod_mask == MOD_MASK_ALT)
 	    {
diff --git a/src/feature.h b/src/feature.h
index a41e79f..1be1833 100644
--- a/src/feature.h
+++ b/src/feature.h
@@ -61,7 +61,7 @@
  */
 #if !defined(FEAT_TINY) && !defined(FEAT_SMALL) && !defined(FEAT_NORMAL) \
 	&& !defined(FEAT_BIG) && !defined(FEAT_HUGE)
-# if defined(UNIX) || defined(WIN3264) || defined(MACOS_X)
+# if defined(UNIX) || defined(MSWIN) || defined(MACOS_X)
 #  define FEAT_HUGE
 # else
 #  if defined(MSWIN) || defined(VMS) || defined(AMIGA)
@@ -343,10 +343,10 @@
  */
 #ifdef FEAT_NORMAL
 # define FEAT_EVAL
-# if defined(HAVE_FLOAT_FUNCS) || defined(WIN3264) || defined(MACOS_X)
+# if defined(HAVE_FLOAT_FUNCS) || defined(MSWIN) || defined(MACOS_X)
 #  define FEAT_FLOAT
 # endif
-# if defined(HAVE_STDINT_H) || defined(WIN3264) || (VIM_SIZEOF_LONG >= 8)
+# if defined(HAVE_STDINT_H) || defined(MSWIN) || (VIM_SIZEOF_LONG >= 8)
 #  define FEAT_NUM64
 # endif
 #endif
@@ -361,7 +361,7 @@
 #if defined(FEAT_HUGE) \
 	&& defined(FEAT_EVAL) \
 	&& ((defined(HAVE_GETTIMEOFDAY) && defined(HAVE_SYS_TIME_H)) \
-		|| defined(WIN3264))
+		|| defined(MSWIN))
 # define FEAT_PROFILE
 #endif
 
@@ -371,14 +371,14 @@
 #if defined(FEAT_NORMAL) \
 	&& defined(FEAT_EVAL) \
 	&& ((defined(HAVE_GETTIMEOFDAY) && defined(HAVE_SYS_TIME_H)) \
-		|| defined(WIN3264))
+		|| defined(MSWIN))
 # define FEAT_RELTIME
 #endif
 
 /*
  * +timers		timer_start()
  */
-#if defined(FEAT_RELTIME) && (defined(UNIX) || defined(WIN32) || defined(VMS) )
+#if defined(FEAT_RELTIME) && (defined(UNIX) || defined(MSWIN) || defined(VMS) )
 # define FEAT_TIMERS
 #endif
 
@@ -603,7 +603,7 @@
  * +multi_byte_ime	Win32 IME input method.  Only for far-east Windows, so
  *			IME can be used to input chars.  Not tested much!
  */
-#if defined(FEAT_GUI_W32) && !defined(FEAT_MBYTE_IME)
+#if defined(FEAT_GUI_MSWIN) && !defined(FEAT_MBYTE_IME)
 /* #define FEAT_MBYTE_IME */
 # endif
 
@@ -659,7 +659,7 @@
 #if defined(HAVE_DLOPEN) && defined(HAVE_DLSYM)
 # define USE_DLOPEN
 #endif
-#if defined(FEAT_EVAL) && (defined(WIN3264) || ((defined(UNIX) || defined(VMS)) \
+#if defined(FEAT_EVAL) && (defined(MSWIN) || ((defined(UNIX) || defined(VMS)) \
 	&& (defined(USE_DLOPEN) || defined(HAVE_SHL_LOAD))))
 # define FEAT_LIBCALL
 #endif
@@ -669,7 +669,7 @@
  */
 #ifdef FEAT_NORMAL
 # define FEAT_MENU
-# ifdef FEAT_GUI_W32
+# ifdef FEAT_GUI_MSWIN
 #  define FEAT_TEAROFF
 # endif
 #endif
@@ -757,7 +757,7 @@
 #endif
 #if !defined(FEAT_GUI_DIALOG) && (defined(FEAT_GUI_MOTIF) \
 	|| defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_GTK) \
-	|| defined(FEAT_GUI_W32))
+	|| defined(FEAT_GUI_MSWIN))
 /* need a dialog to show error messages when starting from the desktop */
 # define FEAT_GUI_DIALOG
 #endif
@@ -828,7 +828,7 @@
  */
 #if defined(FEAT_NORMAL) \
 	&& ((defined(HAVE_GETTIMEOFDAY) && defined(HAVE_SYS_TIME_H)) \
-		|| defined(WIN3264))
+		|| defined(MSWIN))
 # define STARTUPTIME 1
 #endif
 
@@ -1039,7 +1039,7 @@
 # ifdef FEAT_BIG
 #  define FEAT_MOUSE_SGR
 # endif
-# if defined(FEAT_NORMAL) && defined(WIN3264)
+# if defined(FEAT_NORMAL) && defined(MSWIN)
 #  define DOS_MOUSE
 # endif
 # if defined(FEAT_NORMAL) && defined(__QNX__)
@@ -1136,7 +1136,7 @@
  * +clientserver	Remote control via the remote_send() function
  *			and the --remote argument
  */
-#if (defined(WIN32) || defined(FEAT_XCLIPBOARD)) && defined(FEAT_EVAL)
+#if (defined(MSWIN) || defined(FEAT_XCLIPBOARD)) && defined(FEAT_EVAL)
 # define FEAT_CLIENTSERVER
 #endif
 
@@ -1145,7 +1145,7 @@
  *			when --servername is not passed on the command line.
  */
 #if defined(FEAT_CLIENTSERVER) && !defined(FEAT_AUTOSERVERNAME)
-# ifdef WIN3264
+# ifdef MSWIN
     /* Always enabled on MS-Windows. */
 #  define FEAT_AUTOSERVERNAME
 # else
@@ -1169,10 +1169,10 @@
  */
 #ifdef FEAT_NORMAL
 /* MS-DOS console and Win32 console can change cursor shape */
-# if defined(WIN3264) && !defined(FEAT_GUI_W32)
+# if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 #  define MCH_CURSOR_SHAPE
 # endif
-# if defined(FEAT_GUI_W32) || defined(FEAT_GUI_MOTIF) \
+# if defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_MOTIF) \
 	|| defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_GTK) \
 	|| defined(FEAT_GUI_PHOTON)
 #  define FEAT_MOUSESHAPE
@@ -1189,7 +1189,7 @@
 # define CURSOR_SHAPE
 #endif
 
-#if defined(FEAT_MZSCHEME) && (defined(FEAT_GUI_W32) || defined(FEAT_GUI_GTK)    \
+#if defined(FEAT_MZSCHEME) && (defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_GTK)    \
 	|| defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA)	\
 	|| defined(FEAT_GUI_MAC))
 # define MZSCHEME_GUI_THREADS
@@ -1263,7 +1263,7 @@
 # if ((defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA)) \
 		&& defined(HAVE_X11_XPM_H)) \
 	|| defined(FEAT_GUI_GTK) \
-	|| (defined(WIN32) && defined(FEAT_GUI))
+	|| (defined(MSWIN) && defined(FEAT_GUI))
 #  define FEAT_SIGN_ICONS
 # endif
 #endif
@@ -1274,13 +1274,13 @@
  *			Only for GUIs where it was implemented.
  */
 #if (defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA) \
-	|| defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32)) \
+	|| defined(FEAT_GUI_GTK) || defined(FEAT_GUI_MSWIN)) \
 	&& (   ((defined(FEAT_TOOLBAR) || defined(FEAT_GUI_TABLINE)) \
-		&& !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_W32)) \
+		&& !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MSWIN)) \
 	    || defined(FEAT_NETBEANS_INTG) || defined(FEAT_EVAL))
 # define FEAT_BEVAL_GUI
 # if !defined(FEAT_XFONTSET) && !defined(FEAT_GUI_GTK) \
-	&& !defined(FEAT_GUI_W32)
+	&& !defined(FEAT_GUI_MSWIN)
 #  define FEAT_XFONTSET
 # endif
 #endif
@@ -1293,7 +1293,7 @@
  * +balloon_eval_term	Allow balloon expression evaluation in the terminal.
  */
 #if defined(FEAT_HUGE) && defined(FEAT_TIMERS) && \
-	(defined(UNIX) || defined(VMS) || (defined(WIN32) && !defined(FEAT_GUI_W32)))
+	(defined(UNIX) || defined(VMS) || (defined(MSWIN) && !defined(FEAT_GUI_MSWIN)))
 # define FEAT_BEVAL_TERM
 #endif
 
@@ -1340,13 +1340,13 @@
  * +filterpipe
  */
 #if (defined(UNIX) && !defined(USE_SYSTEM)) \
-	    || (defined(WIN3264) && defined(FEAT_GUI_W32))
+	    || (defined(MSWIN) && defined(FEAT_GUI_MSWIN))
 # define FEAT_FILTERPIPE
 #endif
 
 /*
  * +vtp: Win32 virtual console.
  */
-#if !defined(FEAT_GUI) && defined(WIN3264)
+#if !defined(FEAT_GUI) && defined(MSWIN)
 # define FEAT_VTP
 #endif
diff --git a/src/fileio.c b/src/fileio.c
index 85d2df3..841de1c 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -49,7 +49,7 @@
 #define FIO_UCS2	0x04	/* convert UCS-2 */
 #define FIO_UCS4	0x08	/* convert UCS-4 */
 #define FIO_UTF16	0x10	/* convert UTF-16 */
-#ifdef WIN3264
+#ifdef MSWIN
 # define FIO_CODEPAGE	0x20	/* convert MS-Windows codepage */
 # define FIO_PUT_CP(x) (((x) & 0xffff) << 16)	/* put codepage in top word */
 # define FIO_GET_CP(x)	(((x)>>16) & 0xffff)	/* get codepage from top word */
@@ -106,7 +106,7 @@
 static int get_fio_flags(char_u *ptr);
 static char_u *check_for_bom(char_u *p, long size, int *lenp, int flags);
 static int make_bom(char_u *buf, char_u *name);
-#ifdef WIN3264
+#ifdef MSWIN
 static int get_win_fio_flags(char_u *ptr);
 #endif
 #ifdef MACOS_CONVERT
@@ -1038,7 +1038,7 @@
 	else if (enc_utf8 || STRCMP(p_enc, "latin1") == 0)
 	    fio_flags = get_fio_flags(fenc);
 
-#ifdef WIN3264
+#ifdef MSWIN
 	/*
 	 * Conversion from an MS-Windows codepage to UTF-8 or another codepage
 	 * is handled with MultiByteToWideChar().
@@ -1229,7 +1229,7 @@
 		    size = (size * 2 / 3) & ~3;
 		else if (fio_flags == FIO_UCSBOM)
 		    size = size / ICONV_MULT;	/* worst case */
-#ifdef WIN3264
+#ifdef MSWIN
 		else if (fio_flags & FIO_CODEPAGE)
 		    size = size / ICONV_MULT;	/* also worst case */
 #endif
@@ -1590,7 +1590,7 @@
 	    }
 #endif
 
-#ifdef WIN3264
+#ifdef MSWIN
 	    if (fio_flags & FIO_CODEPAGE)
 	    {
 		char_u	*src, *dst;
@@ -2559,7 +2559,7 @@
 	curbuf->b_op_end.lnum = from + linecnt;
 	curbuf->b_op_end.col = 0;
 
-#ifdef WIN32
+#ifdef MSWIN
 	/*
 	 * Work around a weird problem: When a file has two links (only
 	 * possible on NTFS) and we write through one link, then stat() it
@@ -3601,13 +3601,13 @@
      */
     if (!(append && *p_pm == NUL) && !filtering && perm >= 0 && dobackup)
     {
-#if defined(UNIX) || defined(WIN32)
+#if defined(UNIX) || defined(MSWIN)
 	stat_T	    st;
 #endif
 
 	if ((bkc & BKC_YES) || append)	/* "yes" */
 	    backup_copy = TRUE;
-#if defined(UNIX) || defined(WIN32)
+#if defined(UNIX) || defined(MSWIN)
 	else if ((bkc & BKC_AUTO))	/* "auto" */
 	{
 	    int		i;
@@ -3632,7 +3632,7 @@
 		backup_copy = TRUE;
 	    else
 # else
-#  ifdef WIN32
+#  ifdef MSWIN
 	    /* On NTFS file systems hard links are possible. */
 	    if (mch_is_linked(fname))
 		backup_copy = TRUE;
@@ -3715,7 +3715,7 @@
 		    && (lstat_res != 0 || st.st_ino == st_old.st_ino))
 		backup_copy = FALSE;
 # else
-#  if defined(WIN32)
+#  if defined(MSWIN)
 	    /* Symlinks. */
 	    if ((bkc & BKC_BREAKSYMLINK) && mch_is_symbolic_link(fname))
 		backup_copy = FALSE;
@@ -3744,7 +3744,7 @@
 	    stat_T	st_new;
 	    char_u	*dirp;
 	    char_u	*rootname;
-#if defined(UNIX) || defined(WIN3264)
+#if defined(UNIX) || defined(MSWIN)
 	    char_u      *p;
 #endif
 #if defined(UNIX)
@@ -3785,7 +3785,7 @@
 		 */
 		(void)copy_option_part(&dirp, copybuf, BUFSIZE, ",");
 
-#if defined(UNIX) || defined(WIN3264)
+#if defined(UNIX) || defined(MSWIN)
 		p = copybuf + STRLEN(copybuf);
 		if (after_pathsep(copybuf, p) && p[-1] == p[-2])
 		    // Ends with '//', use full path
@@ -4018,7 +4018,7 @@
 		 */
 		(void)copy_option_part(&dirp, IObuff, IOSIZE, ",");
 
-#if defined(UNIX) || defined(WIN3264)
+#if defined(UNIX) || defined(MSWIN)
 		p = IObuff + STRLEN(IObuff);
 		if (after_pathsep(IObuff, p) && p[-1] == p[-2])
 		    // path ends with '//', use full path
@@ -4177,7 +4177,7 @@
 	}
     }
 
-#ifdef WIN3264
+#ifdef MSWIN
     if (converted && wb_flags == 0 && (wb_flags = get_win_fio_flags(fenc)) != 0)
     {
 	/* Convert UTF-8 -> UCS-2 and UCS-2 -> DBCS.  Worst-case * 4: */
@@ -4416,7 +4416,7 @@
 		vim_ignored = ftruncate(fd, (off_t)0);
 #endif
 
-#if defined(WIN3264)
+#if defined(MSWIN)
 	    if (backup != NULL && overwriting && !append)
 	    {
 		if (backup_copy)
@@ -5430,7 +5430,7 @@
 	    }
 	}
 
-#ifdef WIN3264
+#ifdef MSWIN
 	else if (flags & FIO_CODEPAGE)
 	{
 	    /*
@@ -5869,7 +5869,7 @@
     return 0;
 }
 
-#ifdef WIN3264
+#ifdef MSWIN
 /*
  * Check "ptr" for a MS-Windows codepage name and return the FIO_ flags needed
  * for the conversion MS-Windows can do for us.  Also accept "utf-8".
@@ -6041,9 +6041,9 @@
 	p = full_path + len;
 #if defined(MSWIN)
 	/*
-	 * MSWIN: when a file is in the root directory, dir_name will end in a
-	 * slash, since C: by itself does not define a specific dir. In this
-	 * case p may already be correct. <negri>
+	 * MS-Windows: when a file is in the root directory, dir_name will end
+	 * in a slash, since C: by itself does not define a specific dir. In
+	 * this case p may already be correct. <negri>
 	 */
 	if (!((len > 2) && (*(p - 2) == ':')))
 #endif
@@ -6298,7 +6298,7 @@
 	else if ((int)STRLEN(e) + extlen > 4)
 	    s = e + 4 - extlen;
     }
-#ifdef WIN3264
+#ifdef MSWIN
     /*
      * If there is no file name, and the extension starts with '.', put a
      * '_' before the dot, because just ".ext" may be invalid if it's on a
@@ -6427,7 +6427,7 @@
 	    use_tmp_file = TRUE;
     }
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
     {
 	BY_HANDLE_FILE_INFORMATION info1, info2;
 
@@ -7189,7 +7189,7 @@
     /* A symbolic link to a directory itself is deleted, not the directory it
      * points to. */
     if (
-# if defined(UNIX) || defined(WIN32)
+# if defined(UNIX) || defined(MSWIN)
 	 mch_isrealdir(name)
 # else
 	 mch_isdir(name)
@@ -7276,7 +7276,7 @@
 {
 #ifdef USE_TMPNAM
     char_u	itmp[L_tmpnam];	/* use tmpnam() */
-#elif defined(WIN3264)
+#elif defined(MSWIN)
     WCHAR	itmp[TEMPNAMELEN];
 #else
     char_u	itmp[TEMPNAMELEN];
@@ -7398,7 +7398,7 @@
 
 #else /* TEMPDIRNAMES */
 
-# ifdef WIN3264
+# ifdef MSWIN
     WCHAR	wszTempFile[_MAX_PATH + 1];
     WCHAR	buf4[4];
     char_u	*retval;
@@ -7428,7 +7428,7 @@
 		*p = '/';
     return retval;
 
-# else /* WIN3264 */
+# else // MSWIN
 
 #  ifdef USE_TMPNAM
     char_u	*p;
@@ -7466,7 +7466,7 @@
 #  endif
 
     return vim_strsave(itmp);
-# endif /* WIN3264 */
+# endif // MSWIN
 #endif /* TEMPDIRNAMES */
 }
 
diff --git a/src/getchar.c b/src/getchar.c
index eaef1ab..7039c9c 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -1623,7 +1623,7 @@
 	    }
 	    c = TO_SPECIAL(c2, c);
 
-#if defined(FEAT_GUI_W32) && defined(FEAT_MENU) && defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) && defined(FEAT_MENU) && defined(FEAT_TEAROFF)
 	    /* Handle K_TEAROFF here, the caller of vgetc() doesn't need to
 	     * know that a menu was torn off */
 	    if (c == K_TEAROFF)
@@ -1679,7 +1679,7 @@
 	    case K_KMULTIPLY:	c = '*'; break;
 	    case K_KENTER:	c = CAR; break;
 	    case K_KPOINT:
-#ifdef WIN32
+#ifdef MSWIN
 				// Can be either '.' or a ',',
 				// depending on the type of keypad.
 				c = MapVirtualKey(VK_DECIMAL, 2); break;
@@ -3107,7 +3107,7 @@
 	if (p[0] == NUL || (p[0] == K_SPECIAL
 		    /* timeout may generate K_CURSORHOLD */
 		    && (i < 2 || p[1] != KS_EXTRA || p[2] != (int)KE_CURSORHOLD)
-#if defined(WIN3264) && !defined(FEAT_GUI)
+#if defined(MSWIN) && !defined(FEAT_GUI)
 		    /* Win32 console passes modifiers */
 		    && (i < 2 || p[1] != KS_MODIFIER)
 #endif
diff --git a/src/glbl_ime.cpp b/src/glbl_ime.cpp
index 91d52ed..1661990 100644
--- a/src/glbl_ime.cpp
+++ b/src/glbl_ime.cpp
@@ -134,7 +134,7 @@
     if (pIApp == NULL || pIApp->OnDefWindowProc(hWnd, Msg,
 					    wParam, lParam, &lResult) != S_OK)
     {
-#if defined(WIN3264)
+#if defined(MSWIN)
 	if (wide_WindowProc)
 	    lResult = DefWindowProcW(hWnd, Msg, wParam, lParam);
 	else
diff --git a/src/globals.h b/src/globals.h
index 82e663e..729a269 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -19,7 +19,7 @@
  */
 EXTERN long	Rows			/* nr of rows in the screen */
 #ifdef DO_INIT
-# if defined(WIN3264)
+# if defined(MSWIN)
 			    = 25L
 # else
 			    = 24L
@@ -818,7 +818,7 @@
 EXTERN int	enc_unicode INIT(= 0);	/* 2: UCS-2 or UTF-16, 4: UCS-4 */
 EXTERN int	enc_utf8 INIT(= FALSE);		/* UTF-8 encoded Unicode */
 EXTERN int	enc_latin1like INIT(= TRUE);	/* 'encoding' is latin1 comp. */
-#if defined(WIN3264) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
+#if defined(MSWIN) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
 /* Codepage nr of 'encoding'.  Negative means it's not been set yet, zero
  * means 'encoding' is not a valid codepage. */
 EXTERN int	enc_codepage INIT(= -1);
@@ -826,7 +826,7 @@
 #endif
 EXTERN int	has_mbyte INIT(= 0);		/* any multi-byte encoding */
 
-#if defined(WIN3264)
+#if defined(MSWIN)
 EXTERN int	wide_WindowProc INIT(= FALSE);	/* use wide WindowProc() */
 #endif
 
@@ -1296,7 +1296,7 @@
 EXTERN int	echo_wid_arg INIT(= FALSE);	/* --echo-wid argument */
 #endif
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 /*
  * The value of the --windowid argument.
  * For embedding gvim inside another application.
@@ -1645,7 +1645,7 @@
 EXTERN int *eval_lavars_used INIT(= NULL);
 #endif
 
-#ifdef WIN3264
+#ifdef MSWIN
 EXTERN int ctrl_break_was_pressed INIT(= FALSE);
 #endif
 
diff --git a/src/gui.c b/src/gui.c
index d993bc6..ada338f 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -749,7 +749,7 @@
 						     &general_beval_cb, NULL);
 	}
 #  else
-#   ifdef FEAT_GUI_W32
+#   ifdef FEAT_GUI_MSWIN
 	balloonEval = gui_mch_create_beval_area(NULL, NULL,
 						     &general_beval_cb, NULL);
 #   endif
@@ -2432,7 +2432,7 @@
 	int	curr_wide = FALSE;  /* use 'guifontwide' */
 	int	prev_wide = FALSE;
 	int	wide_changed;
-# ifdef WIN3264
+# ifdef MSWIN
 	int	sep_comp = FALSE;   /* Don't separate composing chars. */
 # else
 	int	sep_comp = TRUE;    /* Separate composing chars. */
@@ -2568,7 +2568,7 @@
 	/* Draw the sign on top of the spaces. */
 	gui_mch_drawsign(gui.row, col, gui.highlight_mask);
 # if defined(FEAT_NETBEANS_INTG) && (defined(FEAT_GUI_X11) \
-	|| defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32))
+	|| defined(FEAT_GUI_GTK) || defined(FEAT_GUI_MSWIN))
     if (multi_sign)
 	netbeans_draw_multisign_indicator(gui.row);
 # endif
@@ -3561,7 +3561,7 @@
 		fix_size = TRUE;
 	}
 #endif
-#if defined(FEAT_MENU) && !(defined(WIN3264) && !defined(FEAT_TEAROFF))
+#if defined(FEAT_MENU) && !(defined(MSWIN) && !defined(FEAT_TEAROFF))
 	if (using_tearoff != prev_tearoff)
 	{
 	    gui_mch_toggle_tearoffs(using_tearoff);
@@ -4125,7 +4125,7 @@
     /* Update the horizontal scrollbar */
     gui_update_horiz_scrollbar(force);
 
-#ifndef WIN3264
+#ifndef MSWIN
     /* Return straight away if there is neither a left nor right scrollbar.
      * On MS-Windows this is required anyway for scrollwheel messages. */
     if (!gui.which_scrollbars[SBAR_LEFT] && !gui.which_scrollbars[SBAR_RIGHT])
@@ -4879,9 +4879,10 @@
 
 /*
  * Find window where the mouse pointer "x" / "y" coordinate is in.
+ * As a side effect update the shape of the mouse pointer.
  */
     static win_T *
-xy2win(int x UNUSED, int y UNUSED)
+xy2win(int x, int y)
 {
     int		row;
     int		col;
@@ -4951,8 +4952,9 @@
 	ex_next(eap);
 }
 
-#if ((defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32) \
-	|| defined(FEAT_GUI_PHOTON)) && defined(FEAT_TOOLBAR)) || defined(PROTO)
+#if ((defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK) \
+	    || defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_PHOTON)) \
+	    && defined(FEAT_TOOLBAR)) || defined(PROTO)
 /*
  * This is shared between Athena, Motif and GTK.
  */
diff --git a/src/gui.h b/src/gui.h
index a57b0a3..f5f0570 100644
--- a/src/gui.h
+++ b/src/gui.h
@@ -90,7 +90,7 @@
  * X_2_COL  - Convert X pixel coord into character column.
  * Y_2_ROW  - Convert Y pixel coord into character row.
  */
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 # define TEXT_X(col)	((col) * gui.char_width)
 # define TEXT_Y(row)	((row) * gui.char_height + gui.char_ascent)
 # define FILL_X(col)	((col) * gui.char_width)
@@ -406,7 +406,7 @@
 #endif	/* FEAT_GUI_GTK */
 
 #if defined(FEAT_GUI_TABLINE) \
-	&& (defined(FEAT_GUI_W32) || defined(FEAT_GUI_MOTIF) \
+	&& (defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_MOTIF) \
 		|| defined(FEAT_GUI_MAC))
     int		tabline_height;
 #endif
diff --git a/src/gui_beval.c b/src/gui_beval.c
index 3a28218..e1e093f 100644
--- a/src/gui_beval.c
+++ b/src/gui_beval.c
@@ -13,7 +13,7 @@
 #if defined(FEAT_BEVAL_GUI) || defined(PROTO)
 
 /* on Win32 only get_beval_info() is required */
-#if !defined(FEAT_GUI_W32) || defined(PROTO)
+#if !defined(FEAT_GUI_MSWIN) || defined(PROTO)
 
 #ifdef FEAT_GUI_GTK
 # if GTK_CHECK_VERSION(3,0,0)
@@ -197,10 +197,10 @@
     return current_beval;
 }
 #endif
-#endif /* !FEAT_GUI_W32 */
+#endif /* !FEAT_GUI_MSWIN */
 
 #if defined(FEAT_NETBEANS_INTG) || defined(FEAT_EVAL) || defined(PROTO)
-# if !defined(FEAT_GUI_W32) || defined(PROTO)
+# if !defined(FEAT_GUI_MSWIN) || defined(PROTO)
 
 /*
  * Show a balloon with "mesg".
@@ -214,10 +214,10 @@
     else
 	undrawBalloon(beval);
 }
-# endif /* !FEAT_GUI_W32 */
+# endif /* !FEAT_GUI_MSWIN */
 #endif /* FEAT_NETBEANS_INTG || PROTO */
 
-#if !defined(FEAT_GUI_W32) || defined(PROTO)
+#if !defined(FEAT_GUI_MSWIN) || defined(PROTO)
 #if defined(FEAT_BEVAL_TIP) || defined(PROTO)
 /*
  * Hide the given balloon.
@@ -1220,6 +1220,6 @@
 }
 
 #endif /* !FEAT_GUI_GTK */
-#endif /* !FEAT_GUI_W32 */
+#endif /* !FEAT_GUI_MSWIN */
 
 #endif /* FEAT_BEVAL_GUI */
diff --git a/src/gui_gtk.c b/src/gui_gtk.c
index 3d08934..ba8fd9d 100644
--- a/src/gui_gtk.c
+++ b/src/gui_gtk.c
@@ -76,7 +76,7 @@
 #  include <gdk/gdkkeysyms.h>
 # endif
 # include <gdk/gdk.h>
-# ifdef WIN3264
+# ifdef MSWIN
 #  include <gdk/gdkwin32.h>
 # else
 #  include <gdk/gdkx.h>
diff --git a/src/gui_gtk_f.c b/src/gui_gtk_f.c
index 3f376c0..d81474b 100644
--- a/src/gui_gtk_f.c
+++ b/src/gui_gtk_f.c
@@ -32,7 +32,7 @@
 #if !GTK_CHECK_VERSION(3,0,0)
 # include <gtk/gtksignal.h>
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
 # include <gdk/gdkwin32.h>
 #else
 # include <gdk/gdkx.h>
diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index b76aacd..5e74adc 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -86,7 +86,7 @@
 #  include <gdk/gdkkeysyms.h>
 # endif
 # include <gdk/gdk.h>
-# ifdef WIN3264
+# ifdef MSWIN
 #  include <gdk/gdkwin32.h>
 # else
 #  include <gdk/gdkx.h>
diff --git a/src/if_cscope.c b/src/if_cscope.c
index 4cc053e..0334674 100644
--- a/src/if_cscope.c
+++ b/src/if_cscope.c
@@ -548,7 +548,7 @@
 	    goto add_err;
 
 	while (fname[strlen(fname)-1] == '/'
-#ifdef WIN32
+#ifdef MSWIN
 		|| fname[strlen(fname)-1] == '\\'
 #endif
 		)
@@ -790,7 +790,7 @@
 #endif
     int		len;
     char	*prog, *cmd, *ppath = NULL;
-#ifdef WIN32
+#ifdef MSWIN
     int		fd;
     SECURITY_ATTRIBUTES sa;
     PROCESS_INFORMATION pi;
@@ -844,7 +844,7 @@
 	(void)close(to_cs[1]);
 	(void)close(from_cs[0]);
 #else
-	/* WIN32 */
+	/* MSWIN */
 	/* Create pipes to communicate with cscope */
 	sa.nLength = sizeof(SECURITY_ATTRIBUTES);
 	sa.bInheritHandle = TRUE;
@@ -874,7 +874,7 @@
 #ifdef UNIX
 	    return CSCOPE_FAILURE;
 #else
-	    /* WIN32 */
+	    /* MSWIN */
 	    goto err_closing;
 #endif
 	}
@@ -891,7 +891,7 @@
 #ifdef UNIX
 		return CSCOPE_FAILURE;
 #else
-		/* WIN32 */
+		/* MSWIN */
 		goto err_closing;
 #endif
 	    }
@@ -910,7 +910,7 @@
 #ifdef UNIX
 	    return CSCOPE_FAILURE;
 #else
-	    /* WIN32 */
+	    /* MSWIN */
 	    goto err_closing;
 #endif
 	}
@@ -919,7 +919,7 @@
 #if defined(UNIX)
 	(void)sprintf(cmd, "exec %s -dl -f %s", prog, csinfo[i].fname);
 #else
-	/* WIN32 */
+	/* MSWIN */
 	(void)sprintf(cmd, "%s -dl -f %s", prog, csinfo[i].fname);
 #endif
 	if (csinfo[i].ppath != NULL)
@@ -971,7 +971,7 @@
     }
 
 #else
-    /* WIN32 */
+    /* MSWIN */
     /* Create a new process to run cscope and use pipes to talk with it */
     GetStartupInfo(&si);
     si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
@@ -1330,7 +1330,7 @@
     csinfo[i].pid    = 0;
     csinfo[i].fr_fp  = NULL;
     csinfo[i].to_fp  = NULL;
-#if defined(WIN32)
+#if defined(MSWIN)
     csinfo[i].hProc = NULL;
 #endif
 }
@@ -1940,13 +1940,13 @@
     s = path + strlen(path) - 1;
     for (i = 0; i < p_cspc; ++i)
 	while (s > path && *--s != '/'
-#ifdef WIN32
+#ifdef MSWIN
 		&& *--s != '\\'
 #endif
 		)
 	    ;
     if ((s > path && *s == '/')
-#ifdef WIN32
+#ifdef MSWIN
 	|| (s > path && *s == '\\')
 #endif
 	    )
@@ -2433,7 +2433,7 @@
     if (csinfo[i].ppath != NULL
 	    && (strncmp(name, csinfo[i].ppath, strlen(csinfo[i].ppath)) != 0)
 	    && (name[0] != '/')
-#ifdef WIN32
+#ifdef MSWIN
 	    && name[0] != '\\' && name[1] != ':'
 #endif
        )
diff --git a/src/if_cscope.h b/src/if_cscope.h
index 419c469..6f3b02d 100644
--- a/src/if_cscope.h
+++ b/src/if_cscope.h
@@ -11,7 +11,7 @@
 
 #if defined(FEAT_CSCOPE) || defined(PROTO)
 
-#if defined (WIN32)
+#if defined (MSWIN)
 # ifndef WIN32_LEAN_AND_MEAN
 #  define WIN32_LEAN_AND_MEAN
 # endif
@@ -45,7 +45,7 @@
     dev_t	    st_dev;	/* ID of dev containing cscope db */
     ino_t	    st_ino;	/* inode number of cscope db */
 #else
-# if defined(WIN32)
+# if defined(MSWIN)
     DWORD	    pid;	/* PID of the connected cscope process. */
     HANDLE	    hProc;	/* cscope process handle */
     DWORD	    nVolume;	/* Volume serial number, instead of st_dev */
diff --git a/src/if_lua.c b/src/if_lua.c
index e650e5e..12643f9 100644
--- a/src/if_lua.c
+++ b/src/if_lua.c
@@ -80,7 +80,7 @@
 
 #ifdef DYNAMIC_LUA
 
-#ifndef WIN3264
+#ifndef MSWIN
 # include <dlfcn.h>
 # define HANDLE void*
 # define load_dll(n) dlopen((n), RTLD_LAZY|RTLD_GLOBAL)
diff --git a/src/if_mzsch.c b/src/if_mzsch.c
index 16c4c88..27925af 100644
--- a/src/if_mzsch.c
+++ b/src/if_mzsch.c
@@ -47,7 +47,7 @@
  * racket-6.3.  See
  * http://docs.racket-lang.org/inside/im_memoryalloc.html?q=scheme_register_tls_space
  */
-#if MZSCHEME_VERSION_MAJOR >= 500 && defined(WIN32) \
+#if MZSCHEME_VERSION_MAJOR >= 500 && defined(MSWIN) \
 	&& defined(USE_THREAD_LOCAL) \
 	&& (!defined(_WIN64) || MZSCHEME_VERSION_MAJOR >= 603)
 # define HAVE_TLS_SPACE 1
@@ -807,7 +807,7 @@
 /* MzScheme threads scheduling stuff */
 static int mz_threads_allow = 0;
 
-#if defined(FEAT_GUI_W32)
+#if defined(FEAT_GUI_MSWIN)
 static void CALLBACK timer_proc(HWND, UINT, UINT_PTR, DWORD);
 static UINT timer_id = 0;
 #elif defined(FEAT_GUI_GTK)
@@ -822,7 +822,7 @@
 static EventLoopTimerUPP timerUPP;
 #endif
 
-#ifndef FEAT_GUI_W32 /* Win32 console and Unix */
+#ifndef FEAT_GUI_MSWIN /* Win32 console and Unix */
     void
 mzvim_check_threads(void)
 {
@@ -847,7 +847,7 @@
 static void remove_timer(void);
 
 /* timers are presented in GUI only */
-# if defined(FEAT_GUI_W32)
+# if defined(FEAT_GUI_MSWIN)
     static void CALLBACK
 timer_proc(HWND hwnd UNUSED, UINT uMsg UNUSED, UINT_PTR idEvent UNUSED, DWORD dwTime UNUSED)
 # elif defined(FEAT_GUI_GTK)
@@ -875,7 +875,7 @@
     static void
 setup_timer(void)
 {
-# if defined(FEAT_GUI_W32)
+# if defined(FEAT_GUI_MSWIN)
     timer_id = SetTimer(NULL, 0, p_mzq, timer_proc);
 # elif defined(FEAT_GUI_GTK)
     timer_id = g_timeout_add((guint)p_mzq, (GSourceFunc)timer_proc, NULL);
@@ -891,7 +891,7 @@
     static void
 remove_timer(void)
 {
-# if defined(FEAT_GUI_W32)
+# if defined(FEAT_GUI_MSWIN)
     KillTimer(NULL, timer_id);
 # elif defined(FEAT_GUI_GTK)
     g_source_remove(timer_id);
diff --git a/src/if_ole.cpp b/src/if_ole.cpp
index 0888883..8ee348d 100644
--- a/src/if_ole.cpp
+++ b/src/if_ole.cpp
@@ -6,7 +6,7 @@
  * Do ":help credits" in Vim to see a list of people who contributed.
  */
 
-#if defined(FEAT_OLE) && defined(FEAT_GUI_W32)
+#if defined(FEAT_OLE) && defined(WIN32) && defined(FEAT_GUI)
 /*
  * OLE server implementation.
  *
diff --git a/src/if_perl.xs b/src/if_perl.xs
index 67d0b948..2655640 100644
--- a/src/if_perl.xs
+++ b/src/if_perl.xs
@@ -100,7 +100,7 @@
 
 // Work around for ActivePerl 5.20.3+: Avoid generating (g)vim.lib.
 #if defined(ACTIVEPERL_VERSION) && (ACTIVEPERL_VERSION >= 2003) \
-	&& defined(WIN32) && defined(USE_DYNAMIC_LOADING)
+	&& defined(MSWIN) && defined(USE_DYNAMIC_LOADING)
 # undef XS_EXTERNAL
 # define XS_EXTERNAL(name) XSPROTO(name)
 #endif
@@ -154,7 +154,7 @@
 #if defined(DYNAMIC_PERL) || defined(PROTO)
 
 # ifndef DYNAMIC_PERL /* just generating prototypes */
-#  ifdef WIN3264
+#  ifdef MSWIN
 typedef int HANDLE;
 #  endif
 typedef int XSINIT_t;
@@ -164,7 +164,7 @@
 typedef int perl_key;
 # endif
 
-# ifndef WIN3264
+# ifndef MSWIN
 #  include <dlfcn.h>
 #  define HANDLE void*
 #  define PERL_PROC void*
diff --git a/src/if_python.c b/src/if_python.c
index 3438046..06c46bc 100644
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -35,7 +35,7 @@
 # undef _POSIX_THREADS
 #endif
 
-#if defined(_WIN32) && defined(HAVE_FCNTL_H)
+#if defined(MSWIN) && defined(HAVE_FCNTL_H)
 # undef HAVE_FCNTL_H
 #endif
 
@@ -127,7 +127,7 @@
 #  define HINSTANCE long_u		/* for generating prototypes */
 # endif
 
-# ifndef WIN3264
+# ifndef MSWIN
 #  include <dlfcn.h>
 #  define FARPROC void*
 #  define HINSTANCE void*
diff --git a/src/if_python3.c b/src/if_python3.c
index 4bbbdd1..8b4bee9 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -34,7 +34,7 @@
 
 #include <limits.h>
 
-#if defined(_WIN32) && defined(HAVE_FCNTL_H)
+#if defined(MSWIN) && defined(HAVE_FCNTL_H)
 # undef HAVE_FCNTL_H
 #endif
 
@@ -112,7 +112,7 @@
 
 #if defined(DYNAMIC_PYTHON3) || defined(PROTO)
 
-# ifndef WIN3264
+# ifndef MSWIN
 #  include <dlfcn.h>
 #  define FARPROC void*
 #  define HINSTANCE void*
diff --git a/src/if_ruby.c b/src/if_ruby.c
index 24814a2..85f94c4 100644
--- a/src/if_ruby.c
+++ b/src/if_ruby.c
@@ -64,7 +64,7 @@
 #  define RUBY_EXPORT
 # endif
 
-#if !(defined(WIN32) || defined(_WIN64))
+#if !defined(MSWIN)
 # include <dlfcn.h>
 # define HINSTANCE void*
 # define RUBY_PROC void*
@@ -331,7 +331,7 @@
 # endif
 # define ruby_init			dll_ruby_init
 # define ruby_init_loadpath		dll_ruby_init_loadpath
-# ifdef WIN3264
+# ifdef MSWIN
 #  ifdef RUBY19_OR_LATER
 #   define ruby_sysinit			dll_ruby_sysinit
 #  else
@@ -447,7 +447,7 @@
 # endif
 static void (*dll_ruby_init) (void);
 static void (*dll_ruby_init_loadpath) (void);
-# ifdef WIN3264
+# ifdef MSWIN
 #  ifdef RUBY19_OR_LATER
 static void (*dll_ruby_sysinit) (int*, char***);
 #  else
@@ -666,7 +666,7 @@
 # endif
     {"ruby_init", (RUBY_PROC*)&dll_ruby_init},
     {"ruby_init_loadpath", (RUBY_PROC*)&dll_ruby_init_loadpath},
-# ifdef WIN3264
+# ifdef MSWIN
 #  ifdef RUBY19_OR_LATER
     {"ruby_sysinit", (RUBY_PROC*)&dll_ruby_sysinit},
 #  else
@@ -949,7 +949,7 @@
 	if (ruby_enabled(TRUE))
 	{
 #endif
-#ifdef _WIN32
+#ifdef MSWIN
 	    /* suggested by Ariya Mizutani */
 	    int argc = 1;
 	    char *argv[] = {"gvim.exe"};
diff --git a/src/if_tcl.c b/src/if_tcl.c
index eb6684c..46378a2 100644
--- a/src/if_tcl.c
+++ b/src/if_tcl.c
@@ -160,7 +160,7 @@
 typedef int HANDLE;
 # endif
 
-# ifndef WIN3264
+# ifndef MSWIN
 #  include <dlfcn.h>
 #  define HANDLE void*
 #  define TCL_PROC void*
@@ -1741,11 +1741,11 @@
 #endif
 
 	Tcl_SetChannelOption(interp, ch1, "-buffering", "line");
-#ifdef WIN3264
+#ifdef MSWIN
 	Tcl_SetChannelOption(interp, ch1, "-translation", "lf");
 #endif
 	Tcl_SetChannelOption(interp, ch2, "-buffering", "line");
-#ifdef WIN3264
+#ifdef MSWIN
 	Tcl_SetChannelOption(interp, ch2, "-translation", "lf");
 #endif
 
diff --git a/src/macros.h b/src/macros.h
index 29607db..b81af8c 100644
--- a/src/macros.h
+++ b/src/macros.h
@@ -160,11 +160,11 @@
 # define mch_stat(n, p)		stat(vms_fixfilename(n), (p))
 # define mch_rmdir(n)		rmdir(vms_fixfilename(n))
 #else
-# ifndef WIN32
+# ifndef MSWIN
 #   define mch_access(n, p)	access((n), (p))
 # endif
 # define mch_fstat(n, p)	fstat((n), (p))
-# ifdef MSWIN	/* has its own mch_stat() function */
+# ifdef MSWIN	// has its own mch_stat() function
 #  define mch_stat(n, p)	vim_stat((n), (p))
 # else
 #  ifdef STAT_IGNORES_SLASH
@@ -194,7 +194,7 @@
 #if defined(UNIX) || defined(VMS)  /* open in rw------- mode */
 # define mch_open_rw(n, f)	mch_open((n), (f), (mode_t)0600)
 #else
-# if defined(MSWIN)  /* open read/write */
+# if defined(MSWIN)  // open read/write
 #  define mch_open_rw(n, f)	mch_open((n), (f), S_IREAD | S_IWRITE)
 # else
 #  define mch_open_rw(n, f)	mch_open((n), (f), 0)
@@ -269,7 +269,7 @@
 #  include <math.h>
 # endif
 # ifdef USING_FLOAT_STUFF
-#  if defined(WIN32)
+#  ifdef MSWIN
 #   ifndef isnan
 #    define isnan(x) _isnan(x)
      static __inline int isinf(double x) { return !_finite(x) && !_isnan(x); }
diff --git a/src/main.c b/src/main.c
index 6ad6fff..d4e0349 100644
--- a/src/main.c
+++ b/src/main.c
@@ -11,7 +11,7 @@
 #include "vim.h"
 
 #ifdef __CYGWIN__
-# ifndef WIN32
+# ifndef MSWIN
 #  include <cygwin/version.h>
 #  include <sys/cygwin.h>	/* for cygwin_conv_to_posix_path() and/or
 				 * cygwin_conv_path() */
@@ -19,7 +19,7 @@
 # include <limits.h>
 #endif
 
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 # include "iscygpty.h"
 #endif
 
@@ -119,7 +119,7 @@
      */
     mch_early_init();
 
-#if defined(WIN32)
+#ifdef MSWIN
     /*
      * MinGW expands command line arguments, which confuses our code to
      * convert when 'encoding' changes.  Get the unexpanded arguments.
@@ -250,7 +250,7 @@
 	params.fname = alist_name(&GARGLIST[0]);
     }
 
-#if defined(WIN32)
+#ifdef MSWIN
     {
 	extern void set_alist_count(void);
 
@@ -854,7 +854,7 @@
     }
 #endif
 
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
     mch_set_winsize_now();	    /* Allow winsize changes from now on */
 #endif
 
@@ -880,7 +880,7 @@
     {
 # ifdef FEAT_GUI
 #  if !defined(FEAT_GUI_X11) && !defined(FEAT_GUI_GTK)  \
-		&& !defined(FEAT_GUI_W32)
+		&& !defined(FEAT_GUI_MSWIN)
 	if (gui.in_use)
 	{
 	    mch_errmsg(_("netbeans is not supported with this GUI\n"));
@@ -1534,7 +1534,7 @@
     if (garbage_collect_at_exit)
 	garbage_collect(FALSE);
 #endif
-#if defined(WIN32)
+#ifdef MSWIN
     free_cmd_argsW();
 #endif
 
@@ -1559,7 +1559,7 @@
     setlocale(LC_NUMERIC, "C");
 # endif
 
-# ifdef WIN32
+# ifdef MSWIN
     /* Apparently MS-Windows printf() may cause a crash when we give it 8-bit
      * text while it's expecting text in the current locale.  This call avoids
      * that. */
@@ -1642,8 +1642,8 @@
 	}
 # endif
 
-# if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32)
-#  ifdef FEAT_GUI_W32
+# if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_MSWIN)
+#  ifdef FEAT_GUI_MSWIN
 	else if (STRICMP(argv[i], "--windowid") == 0)
 #  else
 	else if (STRICMP(argv[i], "--socketid") == 0)
@@ -1661,7 +1661,7 @@
 	    if (count != 1)
 		mainerr(ME_INVALID_ARG, (char_u *)argv[i]);
 	    else
-#  ifdef FEAT_GUI_W32
+#  ifdef FEAT_GUI_MSWIN
 		win_socket_id = id;
 #  else
 		gtk_socket_id = id;
@@ -1942,7 +1942,7 @@
 		    }
 		}
 #endif
-#if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32)
+#if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_MSWIN)
 # ifdef FEAT_GUI_GTK
 		else if (STRNICMP(argv[0] + argv_idx, "socketid", 8) == 0)
 # else
@@ -2237,7 +2237,7 @@
 	    case 'u':		/* "-u {vimrc}" vim inits file */
 	    case 'U':		/* "-U {gvimrc}" gvim inits file */
 	    case 'W':		/* "-W {scriptout}" overwrite */
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 	    case 'P':		/* "-P {parent title}" MDI parent */
 #endif
 		want_argument = TRUE;
@@ -2399,7 +2399,7 @@
 		    }
 		    break;
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 		case 'P':		/* "-P {parent title}" MDI parent */
 		    gui_mch_set_parent(argv[0]);
 		    break;
@@ -2445,7 +2445,7 @@
 		}
 	    }
 #endif
-#if defined(__CYGWIN32__) && !defined(WIN32)
+#if defined(__CYGWIN32__) && !defined(MSWIN)
 	    /*
 	     * If vim is invoked by non-Cygwin tools, convert away any
 	     * DOS paths, so things like .swp files are created correctly.
@@ -2481,7 +2481,7 @@
 #endif
 		    );
 
-#if defined(WIN32)
+#ifdef MSWIN
 	    {
 		/* Remember this argument has been added to the argument list.
 		 * Needed when 'encoding' is changed. */
@@ -2561,7 +2561,7 @@
 	    exit(1);
 	}
 #endif
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 	if (is_cygpty_used())
 	{
 # if defined(HAVE_BIND_TEXTDOMAIN_CODESET) \
@@ -3423,7 +3423,7 @@
     main_msg(_("--socketid <xid>\tOpen Vim inside another GTK widget"));
     main_msg(_("--echo-wid\t\tMake gvim echo the Window ID on stdout"));
 #endif
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
     main_msg(_("-P <parent title>\tOpen Vim inside parent application"));
     main_msg(_("--windowid <HWND>\tOpen Vim inside another win32 widget"));
 #endif
@@ -3460,7 +3460,7 @@
 #if defined(STARTUPTIME) || defined(PROTO)
 static struct timeval	prev_timeval;
 
-# ifdef WIN3264
+# ifdef MSWIN
 /*
  * Windows doesn't have gettimeofday(), although it does have struct timeval.
  */
@@ -3567,7 +3567,7 @@
 {
     char_u *val = argv0;
 
-# if defined(WIN32)
+# ifdef MSWIN
     /* A relative path containing a "/" will become invalid when using ":cd",
      * turn it into a full path.
      * On MS-Windows "vim" should be expanded to "vim.exe", thus always do
@@ -3600,7 +3600,7 @@
 
     set_vim_var_string(VV_PROGPATH, val, -1);
 
-# ifdef WIN32
+# ifdef MSWIN
     vim_free(path);
 # endif
 }
@@ -3623,7 +3623,7 @@
 {
     if (parmp->serverName_arg == NULL || *parmp->serverName_arg != NUL)
     {
-# ifdef WIN32
+# ifdef MSWIN
 	/* Initialise the client/server messaging infrastructure. */
 	serverInitMessaging();
 # endif
@@ -3645,7 +3645,7 @@
 	 * clipboard first, it's further down. */
 	parmp->servername = serverMakeName(parmp->serverName_arg,
 							      parmp->argv[0]);
-# ifdef WIN32
+# ifdef MSWIN
 	if (parmp->servername != NULL)
 	{
 	    serverSetName(parmp->servername);
@@ -3842,7 +3842,7 @@
 		break;
 	    }
 
-# ifdef FEAT_GUI_W32
+# ifdef FEAT_GUI_MSWIN
 	    /* Guess that when the server name starts with "g" it's a GUI
 	     * server, which we can bring to the foreground here.
 	     * Foreground() in the server doesn't work very well. */
@@ -3860,7 +3860,7 @@
 		int	j;
 		char_u  *done = alloc(numFiles);
 		char_u  *p;
-# ifdef FEAT_GUI_W32
+# ifdef FEAT_GUI_MSWIN
 		NOTIFYICONDATA ni;
 		int	count = 0;
 		extern HWND message_window;
@@ -3870,7 +3870,7 @@
 		    /* Skip "+cmd" argument, don't wait for it to be edited. */
 		    --numFiles;
 
-# ifdef FEAT_GUI_W32
+# ifdef FEAT_GUI_MSWIN
 		ni.cbSize = sizeof(ni);
 		ni.hWnd = message_window;
 		ni.uID = 0;
@@ -3884,7 +3884,7 @@
 		vim_memset(done, 0, numFiles);
 		while (memchr(done, 0, numFiles) != NULL)
 		{
-# ifdef WIN32
+# ifdef MSWIN
 		    p = serverGetReply(srv, NULL, TRUE, TRUE, 0);
 		    if (p == NULL)
 			break;
@@ -3895,7 +3895,7 @@
 		    j = atoi((char *)p);
 		    if (j >= 0 && j < numFiles)
 		    {
-# ifdef FEAT_GUI_W32
+# ifdef FEAT_GUI_MSWIN
 			++count;
 			sprintf(ni.szTip, _("%d of %d edited"),
 							     count, numFiles);
@@ -3904,7 +3904,7 @@
 			done[j] = 1;
 		    }
 		}
-# ifdef FEAT_GUI_W32
+# ifdef FEAT_GUI_MSWIN
 		Shell_NotifyIcon(NIM_DELETE, &ni);
 # endif
 	    }
@@ -3913,7 +3913,7 @@
 	{
 	    if (i == *argc - 1)
 		mainerr_arg_missing((char_u *)argv[i]);
-# ifdef WIN32
+# ifdef MSWIN
 	    /* Win32 always works? */
 	    if (serverSendToVim(sname, (char_u *)argv[i + 1],
 						  &res, NULL, 1, 0, FALSE) < 0)
@@ -3935,7 +3935,7 @@
 	}
 	else if (STRICMP(argv[i], "--serverlist") == 0)
 	{
-# ifdef WIN32
+# ifdef MSWIN
 	    /* Win32 always works? */
 	    res = serverGetVimNames();
 # else
diff --git a/src/mbyte.c b/src/mbyte.c
index aa10d5e..9ad6404 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -97,7 +97,7 @@
 # define WINBYTE BYTE
 #endif
 
-#if (defined(WIN3264) || defined(WIN32UNIX)) && !defined(__MINGW32__)
+#if (defined(MSWIN) || defined(WIN32UNIX)) && !defined(__MINGW32__)
 # include <winnls.h>
 #endif
 
@@ -117,7 +117,7 @@
 # else
 #  include <gdk/gdkkeysyms.h>
 # endif
-# ifdef WIN3264
+# ifdef MSWIN
 #  include <gdk/gdkwin32.h>
 # else
 #  include <gdk/gdkx.h>
@@ -364,7 +364,7 @@
     {"cyrillic",	IDX_ISO_5},
     {"arabic",		IDX_ISO_6},
     {"greek",		IDX_ISO_7},
-#ifdef WIN3264
+#ifdef MSWIN
     {"hebrew",		IDX_CP1255},
 #else
     {"hebrew",		IDX_ISO_8},
@@ -412,7 +412,7 @@
     {"euccn",		IDX_EUC_CN},
     {"gb2312",		IDX_EUC_CN},
     {"euctw",		IDX_EUC_TW},
-#if defined(WIN3264) || defined(WIN32UNIX) || defined(MACOS_X)
+#if defined(MSWIN) || defined(WIN32UNIX) || defined(MACOS_X)
     {"japan",		IDX_CP932},
     {"korea",		IDX_CP949},
     {"prc",		IDX_CP936},
@@ -465,7 +465,7 @@
     i = enc_canon_search(name);
     if (i >= 0)
 	return enc_canon_table[i].prop;
-#ifdef WIN3264
+#ifdef MSWIN
     if (name[0] == 'c' && name[1] == 'p' && VIM_ISDIGIT(name[2]))
     {
 	CPINFO	cpinfo;
@@ -509,7 +509,7 @@
     int		idx;
     int		n;
     int		enc_dbcs_new = 0;
-#if defined(USE_ICONV) && !defined(WIN3264) && !defined(WIN32UNIX) \
+#if defined(USE_ICONV) && !defined(MSWIN) && !defined(WIN32UNIX) \
 	&& !defined(MACOS_CONVERT)
 # define LEN_FROM_CONV
     vimconv_T	vimconv;
@@ -527,7 +527,7 @@
 	return NULL;
     }
 
-#ifdef WIN3264
+#ifdef MSWIN
     if (p_enc[0] == 'c' && p_enc[1] == 'p' && VIM_ISDIGIT(p_enc[2]))
     {
 	CPINFO	cpinfo;
@@ -566,7 +566,7 @@
     }
     else if (STRNCMP(p_enc, "2byte-", 6) == 0)
     {
-#ifdef WIN3264
+#ifdef MSWIN
 	/* Windows: accept only valid codepage numbers, check below. */
 	if (p_enc[6] != 'c' || p_enc[7] != 'p'
 			      || (enc_dbcs_new = atoi((char *)p_enc + 8)) == 0)
@@ -607,7 +607,7 @@
 
     if (enc_dbcs_new != 0)
     {
-#ifdef WIN3264
+#ifdef MSWIN
 	/* Check if the DBCS code page is OK. */
 	if (!IsValidCodePage(enc_dbcs_new))
 	    goto codepage_invalid;
@@ -618,7 +618,7 @@
     enc_dbcs = enc_dbcs_new;
     has_mbyte = (enc_dbcs != 0 || enc_utf8);
 
-#if defined(WIN3264) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
+#if defined(MSWIN) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
     enc_codepage = encname2codepage(p_enc);
     enc_latin9 = (STRCMP(p_enc, "iso-8859-15") == 0);
 #endif
@@ -699,7 +699,7 @@
 	    n = 1;
 	else
 	{
-#if defined(WIN3264) || defined(WIN32UNIX)
+#if defined(MSWIN) || defined(WIN32UNIX)
 	    /* enc_dbcs is set by setting 'fileencoding'.  It becomes a Windows
 	     * CodePage identifier, which we can pass directly in to Windows
 	     * API */
@@ -783,7 +783,7 @@
 					  enc_utf8 ? "utf-8" : (char *)p_enc);
 #endif
 
-#ifdef WIN32
+#ifdef MSWIN
     /* When changing 'encoding' while starting up, then convert the command
      * line arguments from the active codepage to 'encoding'. */
     if (starting != 0)
@@ -909,7 +909,7 @@
 		unsigned char tb = trail;
 
 		/* convert process code to JIS */
-# if defined(WIN3264) || defined(WIN32UNIX) || defined(MACOS_X)
+# if defined(MSWIN) || defined(WIN32UNIX) || defined(MACOS_X)
 		/* process code is SJIS */
 		if (lb <= 0x9f)
 		    lb = (lb - 0x81) * 2 + 0x21;
@@ -1006,7 +1006,7 @@
 		if (c1 >= 0xB0 && c1 <= 0xC8)
 		    /* Hangul */
 		    return 20;
-#if defined(WIN3264) || defined(WIN32UNIX)
+#if defined(MSWIN) || defined(WIN32UNIX)
 		else if (c1 <= 0xA0 || c2 <= 0xA0)
 		    /* Extended Hangul Region : MS UHC(Unified Hangul Code) */
 		    /* c1: 0x81-0xA0 with c2: 0x41-0x5A, 0x61-0x7A, 0x81-0xFE
@@ -4393,7 +4393,7 @@
 # include <langinfo.h>
 #endif
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 /*
  * Get the canonicalized encoding from the specified locale string "locale"
  * or from the environment variables LC_ALL, LC_CTYPE and LANG.
@@ -4460,7 +4460,7 @@
     char_u *
 enc_locale(void)
 {
-#ifdef WIN3264
+#ifdef MSWIN
     char	buf[50];
     long	acp = GetACP();
 
@@ -4487,7 +4487,7 @@
 #endif
 }
 
-# if defined(WIN3264) || defined(PROTO) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
+# if defined(MSWIN) || defined(PROTO) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
 /*
  * Convert an encoding name to an MS-Windows codepage.
  * Returns zero if no codepage can be figured out.
@@ -6570,7 +6570,7 @@
 	/* Internal utf-8 -> latin9 conversion. */
 	vcp->vc_type = CONV_TO_LATIN9;
     }
-#ifdef WIN3264
+#ifdef MSWIN
     /* Win32-specific codepage <-> codepage conversion without iconv. */
     else if ((from_is_utf8 || encname2codepage(from) > 0)
 	    && (to_is_utf8 || encname2codepage(to) > 0))
@@ -6620,7 +6620,7 @@
     return OK;
 }
 
-#if defined(FEAT_GUI) || defined(AMIGA) || defined(WIN3264) \
+#if defined(FEAT_GUI) || defined(AMIGA) || defined(MSWIN) \
 	|| defined(PROTO)
 /*
  * Do conversion on typed input characters in-place.
@@ -6870,7 +6870,7 @@
 	    retval = iconv_string(vcp, ptr, len, unconvlenp, lenp);
 	    break;
 # endif
-# ifdef WIN3264
+# ifdef MSWIN
 	case CONV_CODEPAGE:		/* codepage -> codepage */
 	{
 	    int		retlen;
diff --git a/src/memfile.c b/src/memfile.c
index 1a52734..1827bcf 100644
--- a/src/memfile.c
+++ b/src/memfile.c
@@ -621,7 +621,7 @@
 		status = FAIL;
 	}
 #endif
-#ifdef WIN32
+#ifdef MSWIN
 	if (_commit(mfp->mf_fd))
 	    status = FAIL;
 #endif
@@ -1265,7 +1265,7 @@
 	 * try to open the file
 	 */
 	flags |= O_EXTRA | O_NOFOLLOW;
-#ifdef WIN32
+#ifdef MSWIN
 	/* Prevent handle inheritance that cause problems with Cscope
 	 * (swap file may not be deleted if cscope connection was open after
 	 * the file) */
diff --git a/src/memline.c b/src/memline.c
index c62ea5f..66be0f3 100644
--- a/src/memline.c
+++ b/src/memline.c
@@ -1807,7 +1807,7 @@
 #else
 		names[0] = vim_strsave((char_u *)"*.sw?");
 #endif
-#if defined(UNIX) || defined(WIN3264)
+#if defined(UNIX) || defined(MSWIN)
 		/* For Unix names starting with a dot are special.  MS-Windows
 		 * supports this too, on some file systems. */
 		names[1] = vim_strsave((char_u *)".*.sw?");
@@ -1834,7 +1834,7 @@
 #else
 		names[0] = concat_fnames(dir_name, (char_u *)"*.sw?", TRUE);
 #endif
-#if defined(UNIX) || defined(WIN3264)
+#if defined(UNIX) || defined(MSWIN)
 		/* For Unix names starting with a dot are special.  MS-Windows
 		 * supports this too, on some file systems. */
 		names[1] = concat_fnames(dir_name, (char_u *)".*.sw?", TRUE);
@@ -1851,7 +1851,7 @@
 	    }
 	    else
 	    {
-#if defined(UNIX) || defined(WIN3264)
+#if defined(UNIX) || defined(MSWIN)
 		int	len = (int)STRLEN(dir_name);
 
 		p = dir_name + len;
@@ -1999,7 +1999,7 @@
     return file_count;
 }
 
-#if defined(UNIX) || defined(WIN3264) || defined(PROTO)
+#if defined(UNIX) || defined(MSWIN) || defined(PROTO)
 /*
  * Need _very_ long file names.
  * Append the full path to name with path separators made into percent
@@ -2207,7 +2207,7 @@
      */
     char_u	*p;
     int		i;
-# ifndef WIN3264
+# ifndef MSWIN
     int	    shortname = curbuf->b_shortname;
 
     curbuf->b_shortname = FALSE;
@@ -2252,7 +2252,7 @@
     else
 	++num_names;
 
-# ifndef WIN3264
+# ifndef MSWIN
     /*
      * Also try with 'shortname' set, in case the file is on a DOS filesystem.
      */
@@ -2279,7 +2279,7 @@
 # endif
 
 end:
-# ifndef WIN3264
+# ifndef MSWIN
     curbuf->b_shortname = shortname;
 # endif
 
@@ -4253,7 +4253,7 @@
     char_u	fname_buf[MAXPATHL];
 #endif
 
-#if defined(UNIX) || defined(WIN3264)  /* Need _very_ long file names */
+#if defined(UNIX) || defined(MSWIN)  // Need _very_ long file names
     int		len = (int)STRLEN(dir_name);
 
     s = dir_name + len;
@@ -4343,7 +4343,7 @@
     else
 	retval = concat_fnames(dname, tail, TRUE);
 
-#ifdef WIN3264
+#ifdef MSWIN
     if (retval != NULL)
 	for (t = gettail(retval); *t != NUL; MB_PTR_ADV(t))
 	    if (*t == ':')
@@ -4474,7 +4474,7 @@
 # define CREATE_DUMMY_FILE
     FILE	*dummyfd = NULL;
 
-# ifdef WIN3264
+# ifdef MSWIN
     if (buf_fname != NULL && !mch_isFullName(buf_fname)
 				       && vim_strchr(gettail(buf_fname), ':'))
     {
@@ -4927,7 +4927,7 @@
 	mch_remove(buf_fname);
     }
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
     if (buf_fname != buf->b_fname)
 	vim_free(buf_fname);
 #endif
diff --git a/src/menu.c b/src/menu.c
index 085d0e7..41669ed 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -18,7 +18,7 @@
 
 #define MENUDEPTH   10		/* maximum depth of menus */
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 static int add_menu_path(char_u *, vimmenu_T *, int *, char_u *, int);
 #else
 static int add_menu_path(char_u *, vimmenu_T *, int *, char_u *);
@@ -35,7 +35,7 @@
 static char_u *popup_mode_name(char_u *name, int idx);
 static char_u *menu_text(char_u *text, int *mnemonic, char_u **actext);
 
-#if defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF)
 static void gui_create_tearoffs_recurse(vimmenu_T *menu, const char_u *pname, int *pri_tab, int pri_idx);
 static void gui_add_tearoff(char_u *tearpath, int *pri_tab, int pri_idx);
 static void gui_destroy_tearoffs_recurse(vimmenu_T *menu);
@@ -43,7 +43,7 @@
 #endif
 
 static int menu_is_hidden(char_u *name);
-#if defined(FEAT_CMDL_COMPL) || (defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF))
+#if defined(FEAT_CMDL_COMPL) || (defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF))
 static int menu_is_tearoff(char_u *name);
 #endif
 
@@ -122,7 +122,7 @@
     int		i;
 #if defined(FEAT_GUI) && !defined(FEAT_GUI_GTK)
     int		old_menu_height;
-# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
     int		old_toolbar_height;
 # endif
 #endif
@@ -295,7 +295,7 @@
     }
 #if defined(FEAT_GUI) && !(defined(FEAT_GUI_GTK) || defined(FEAT_GUI_PHOTON))
     old_menu_height = gui.menu_height;
-# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
     old_toolbar_height = gui.toolbar_height;
 # endif
 #endif
@@ -381,7 +381,7 @@
 	menuarg.noremap[0] = noremap;
 	menuarg.silent[0] = silent;
 	add_menu_path(menu_path, &menuarg, pri_tab, map_to
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 		, TRUE
 #endif
 		);
@@ -405,7 +405,7 @@
 			menuarg.icon_builtin = FALSE;
 #endif
 			add_menu_path(p, &menuarg, pri_tab, map_to
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 				, TRUE
 #endif
 					 );
@@ -421,7 +421,7 @@
     /* If the menubar height changed, resize the window */
     if (gui.in_use
 	    && (gui.menu_height != old_menu_height
-# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
 		|| gui.toolbar_height != old_toolbar_height
 # endif
 	    ))
@@ -455,7 +455,7 @@
 				   icon_builtin, silent[0], noremap[0] */
     int		*pri_tab,
     char_u	*call_data
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
     , int	addtearoff	/* may add tearoff item */
 #endif
     )
@@ -537,7 +537,7 @@
 		    goto erret;
 		}
 		if (*next_name != NUL && menu->children == NULL
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 			&& addtearoff
 #endif
 			)
@@ -630,7 +630,7 @@
 	    if (*next_name == NUL && menuarg->iconfile != NULL)
 		menu->iconfile = vim_strsave(menuarg->iconfile);
 #endif
-#if defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF)
 	    /* the tearoff item must be present in the modes of each item. */
 	    if (parent != NULL && menu_is_tearoff(parent->children->dname))
 		parent->children->modes |= modes;
@@ -645,7 +645,7 @@
 	     * modes, then make sure it's available for this one now
 	     * Also enable a menu when it's created or changed.
 	     */
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 	    /* If adding a tearbar (addtearoff == FALSE) don't update modes */
 	    if (addtearoff)
 #endif
@@ -680,7 +680,7 @@
 		}
 	    }
 
-# if defined(FEAT_GUI_W32) & defined(FEAT_TEAROFF)
+# if defined(FEAT_GUI_MSWIN) & defined(FEAT_TEAROFF)
 	    /* When adding a new submenu, may add a tearoff item */
 	    if (	addtearoff
 		    && *next_name
@@ -758,7 +758,7 @@
 		c = 0;
 		d = 0;
 		if (amenu && call_data != NULL && *call_data != NUL
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 		       && addtearoff
 #endif
 				       )
@@ -808,7 +808,7 @@
 		menu->silent[i] = menuarg->silent[0];
 	    }
 	}
-#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32) \
+#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN) \
 	&& (defined(FEAT_BEVAL_GUI) || defined(FEAT_GUI_GTK))
 	/* Need to update the menu tip. */
 	if (modes & MENU_TIP_MODE)
@@ -938,7 +938,7 @@
 	    }
 	    if ((menu->modes & modes) != 0x0)
 	    {
-#if defined(FEAT_GUI_W32) & defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) & defined(FEAT_TEAROFF)
 		/*
 		 * If we are removing all entries for this menu,MENU_ALL_MODES,
 		 * Then kill any tearoff before we start
@@ -992,7 +992,7 @@
 
 	/* Recalculate modes for menu based on the new updated children */
 	menu->modes &= ~modes;
-#if defined(FEAT_GUI_W32) & defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) & defined(FEAT_TEAROFF)
 	if ((s_tearoffs) && (menu->children != NULL)) /* there's a tear bar.. */
 	    child = menu->children->next; /* don't count tearoff bar */
 	else
@@ -1003,7 +1003,7 @@
 	if (modes & MENU_TIP_MODE)
 	{
 	    free_menu_string(menu, MENU_INDEX_TIP);
-#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32) \
+#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN) \
 	    && (defined(FEAT_BEVAL_GUI) || defined(FEAT_GUI_GTK))
 	    /* Need to update the menu tip. */
 	    if (gui.in_use)
@@ -1013,7 +1013,7 @@
 	if ((menu->modes & MENU_ALL_MODES) == 0)
 	{
 	    /* The menu item is no longer valid in ANY mode, so delete it */
-#if defined(FEAT_GUI_W32) & defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) & defined(FEAT_TEAROFF)
 	    if (s_tearoffs && menu->children != NULL) /* there's a tear bar.. */
 		free_menu(&menu->children);
 #endif
@@ -1867,7 +1867,7 @@
 }
 
 #if defined(FEAT_CMDL_COMPL) \
-	|| (defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF))
+	|| (defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF))
 /*
  * Return TRUE if the menu is the tearoff menu.
  */
@@ -2031,7 +2031,7 @@
     while (menu)
     {
 	if ((menu->modes & menu->enabled & mode)
-# if defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF)
+# if defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF)
 		|| menu_is_tearoff(menu->dname)
 # endif
 	   )
@@ -2105,7 +2105,7 @@
 # endif
 #endif /* FEAT_GUI */
 
-#if (defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF)) || defined(PROTO)
+#if (defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF)) || defined(PROTO)
 
 /*
  * Deal with tearoff items that are added like a menu item.
@@ -2257,7 +2257,7 @@
     }
 }
 
-#endif /* FEAT_GUI_W32 && FEAT_TEAROFF */
+#endif /* FEAT_GUI_MSWIN && FEAT_TEAROFF */
 
 /*
  * Execute "menu".  Use by ":emenu" and the window toolbar.
diff --git a/src/message.c b/src/message.c
index ed59d1b..621edb9 100644
--- a/src/message.c
+++ b/src/message.c
@@ -2556,7 +2556,7 @@
 msg_use_printf(void)
 {
     return (!msg_check_screen()
-#if defined(WIN3264) && !defined(FEAT_GUI_MSWIN)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 	    || !termcap_active
 #endif
 	    || (swapping_screen() && !termcap_active)
@@ -2573,7 +2573,7 @@
     char_u	*buf = NULL;
     char_u	*p = s;
 
-#ifdef WIN3264
+#ifdef MSWIN
     if (!(silent_mode && p_verbose == 0))
 	mch_settmode(TMODE_COOK);	/* handle CR and NL correctly */
 #endif
@@ -2633,7 +2633,7 @@
 
     msg_didout = TRUE;	    // assume that line is not empty
 
-#ifdef WIN3264
+#ifdef MSWIN
     if (!(silent_mode && p_verbose == 0))
 	mch_settmode(TMODE_RAW);
 #endif
@@ -2934,7 +2934,7 @@
     void
 mch_errmsg(char *str)
 {
-#if defined(WIN3264) && !defined(FEAT_GUI_MSWIN)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
     int	    len = (int)STRLEN(str);
     DWORD   nwrite = 0;
     DWORD   mode = 0;
@@ -3022,7 +3022,7 @@
     void
 mch_msg(char *str)
 {
-#if defined(WIN3264) && !defined(FEAT_GUI_MSWIN)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
     int	    len = (int)STRLEN(str);
     DWORD   nwrite = 0;
     DWORD   mode;
@@ -4008,7 +4008,7 @@
 	    filter = BROWSE_FILTER_DEFAULT;
 	if (flags & BROWSE_DIR)
 	{
-#  if defined(FEAT_GUI_GTK) || defined(WIN3264)
+#  if defined(FEAT_GUI_GTK) || defined(MSWIN)
 	    /* For systems that have a directory dialog. */
 	    fname = gui_mch_browsedir(title, initdir);
 #  else
@@ -4754,7 +4754,7 @@
 			else if (length_modifier == 'L')
 			{
 # ifdef FEAT_NUM64
-#  ifdef WIN3264
+#  ifdef MSWIN
 			    f[f_l++] = 'I';
 			    f[f_l++] = '6';
 			    f[f_l++] = '4';
diff --git a/src/misc1.c b/src/misc1.c
index 1d95790..75f4ab1 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -14,7 +14,7 @@
 #include "vim.h"
 #include "version.h"
 
-#if defined(FEAT_CMDL_COMPL) && defined(WIN3264)
+#if defined(FEAT_CMDL_COMPL) && defined(MSWIN)
 # include <lm.h>
 #endif
 
@@ -3852,7 +3852,7 @@
     var = mch_getenv((char_u *)"HOME");
 #endif
 
-#ifdef WIN3264
+#ifdef MSWIN
     /*
      * Typically, $HOME is not defined on Windows, unless the user has
      * specifically defined it for Vim's sake.  However, on Windows NT
@@ -4318,7 +4318,7 @@
 
     if (p != NULL)
     {
-#if defined(WIN3264)
+#if defined(MSWIN)
 	if (enc_utf8)
 	{
 	    int	    len;
@@ -4362,7 +4362,7 @@
 	    else
 		p = mch_getenv((char_u *)"VIM");
 
-#if defined(WIN3264)
+#if defined(MSWIN)
 	    if (enc_utf8)
 	    {
 		int	len;
@@ -4688,7 +4688,7 @@
 	    add_user((char_u *)pw->pw_name, TRUE);
 	endpwent();
     }
-# elif defined(WIN3264)
+# elif defined(MSWIN)
     {
 	DWORD		nusers = 0, ntotal = 0, i;
 	PUSER_INFO_0	uinfo;
@@ -4820,7 +4820,7 @@
 #else
     homedir_env_orig = homedir_env = mch_getenv((char_u *)"HOME");
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
     if (homedir_env == NULL)
 	homedir_env_orig = homedir_env = mch_getenv((char_u *)"USERPROFILE");
 #endif
@@ -5619,7 +5619,7 @@
 static int expand_backtick(garray_T *gap, char_u *pat, int flags);
 # endif
 
-# if defined(WIN3264)
+# if defined(MSWIN)
 /*
  * File name expansion code for MS-DOS, Win16 and Win32.  It's here because
  * it's shared between these systems.
@@ -5898,7 +5898,7 @@
 {
     return dos_expandpath(gap, path, 0, flags, FALSE);
 }
-# endif /* WIN3264 */
+# endif // MSWIN
 
 #if (defined(UNIX) && !defined(VMS)) || defined(USE_UNIXFILENAME) \
 	|| defined(PROTO)
@@ -6646,7 +6646,7 @@
 {
     char_u *p;
 
-#ifdef WIN3264
+#ifdef MSWIN
     p = gettail(p_sh);
     p = vim_strnsave(p, (int)(skiptowhite(p) - p));
 #else
diff --git a/src/misc2.c b/src/misc2.c
index d323fe5..e513c1b 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -1427,7 +1427,7 @@
     length = (unsigned)STRLEN(string) + 3;  /* two quotes and a trailing NUL */
     for (p = string; *p != NUL; MB_PTR_ADV(p))
     {
-# ifdef WIN32
+# ifdef MSWIN
 	if (!p_ssl)
 	{
 	    if (*p == '"')
@@ -1458,7 +1458,7 @@
 	d = escaped_string;
 
 	/* add opening quote */
-# ifdef WIN32
+# ifdef MSWIN
 	if (!p_ssl)
 	    *d++ = '"';
 	else
@@ -1467,7 +1467,7 @@
 
 	for (p = string; *p != NUL; )
 	{
-# ifdef WIN32
+# ifdef MSWIN
 	    if (!p_ssl)
 	    {
 		if (*p == '"')
@@ -1510,7 +1510,7 @@
 	}
 
 	/* add terminating quote and finish with a NUL */
-# ifdef WIN32
+# ifdef MSWIN
 	if (!p_ssl)
 	    *d++ = '"';
 	else
@@ -2169,7 +2169,7 @@
     }
 }
 
-#if (defined(UNIX) && !defined(USE_SYSTEM)) || defined(WIN3264) \
+#if (defined(UNIX) && !defined(USE_SYSTEM)) || defined(MSWIN) \
 	|| defined(PROTO)
 /*
  * Append the text in "gap" below the cursor line and clear "gap".
@@ -4185,7 +4185,7 @@
     perm = mch_getperm(fname);
 #endif
     if (
-# ifdef WIN3264
+# ifdef MSWIN
 	    mch_writable(fname) &&
 # else
 # if defined(UNIX) || defined(VMS)
@@ -4437,7 +4437,7 @@
     for (i = 0; i < MAX_REPEAT_PARSE; ++i)
     {
 	// For Win32 mch_breakcheck() does not check for input, do it here.
-# if defined(WIN32) && defined(FEAT_JOB_CHANNEL)
+# if defined(MSWIN) && defined(FEAT_JOB_CHANNEL)
 	channel_handle_events(FALSE);
 # endif
 
diff --git a/src/nbdebug.c b/src/nbdebug.c
index 991bc66..b76d9ca 100644
--- a/src/nbdebug.c
+++ b/src/nbdebug.c
@@ -124,7 +124,7 @@
 
 	expand_env((char_u *) file, (char_u *) buf, BUFSIZ);
 	return
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 		(access(buf, F_OK) == 0);
 #else
 		(access(buf, 0) == 0);
diff --git a/src/netbeans.c b/src/netbeans.c
index ecc7625..2682d1c 100644
--- a/src/netbeans.c
+++ b/src/netbeans.c
@@ -27,7 +27,7 @@
 
 #if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
 
-#ifndef WIN32
+#ifndef MSWIN
 # include <netdb.h>
 # ifdef HAVE_LIBGEN_H
 #  include <libgen.h>
@@ -2347,7 +2347,7 @@
 {
 #ifdef FEAT_GUI
 # if !defined(FEAT_GUI_X11) && !defined(FEAT_GUI_GTK)  \
-		&& !defined(FEAT_GUI_W32)
+		&& !defined(FEAT_GUI_MSWIN)
     if (gui.in_use)
     {
 	emsg(_("E838: netbeans is not supported with this GUI"));
@@ -2567,7 +2567,7 @@
 }
 #endif
 
-#if defined(FEAT_GUI_X11) || defined(FEAT_GUI_W32) || defined(PROTO)
+#if defined(FEAT_GUI_X11) || defined(FEAT_GUI_MSWIN) || defined(PROTO)
 /*
  * Tell netbeans that the window was moved or resized.
  */
diff --git a/src/normal.c b/src/normal.c
index ca0d8ff..5ae9ff1 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -5401,7 +5401,7 @@
 # endif
 #endif
 	redraw_later(CLEAR);
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 	resize_console_buf();
 #endif
     }
diff --git a/src/option.c b/src/option.c
index eec8fe0..b71093b 100644
--- a/src/option.c
+++ b/src/option.c
@@ -505,7 +505,7 @@
 			    (char_u *)NULL, PV_NONE,
 #endif
 			    {
-#if (defined(WIN3264)) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 			    (char_u *)128L,
 #else
 			    (char_u *)224L,
@@ -575,7 +575,7 @@
     {"background",  "bg",   P_STRING|P_VI_DEF|P_RCLR,
 			    (char_u *)&p_bg, PV_NONE,
 			    {
-#if (defined(WIN3264)) && !defined(FEAT_GUI)
+#if (defined(MSWIN)) && !defined(FEAT_GUI)
 			    (char_u *)"dark",
 #else
 			    (char_u *)"light",
@@ -1309,7 +1309,7 @@
 #ifdef FEAT_QUICKFIX
 			    (char_u *)&p_gp, PV_GP,
 			    {
-# ifdef WIN3264
+# ifdef MSWIN
 			    /* may be changed to "grep -n" in os_win32.c */
 			    (char_u *)"findstr /n",
 # else
@@ -1739,7 +1739,7 @@
     {"lines",	    NULL,   P_NUM|P_NODEFAULT|P_NO_MKRC|P_VI_DEF|P_RCLR,
 			    (char_u *)&Rows, PV_NONE,
 			    {
-#if defined(WIN3264)
+#if defined(MSWIN)
 			    (char_u *)25L,
 #else
 			    (char_u *)24L,
@@ -1751,7 +1751,7 @@
 #else
 			    (char_u *)NULL, PV_NONE,
 #endif
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 			    {(char_u *)1L, (char_u *)0L}
 #else
 			    {(char_u *)0L, (char_u *)0L}
@@ -1897,7 +1897,7 @@
     {"mouse",	    NULL,   P_STRING|P_VI_DEF|P_FLAGLIST,
 			    (char_u *)&p_mouse, PV_NONE,
 			    {
-#if defined(WIN3264)
+#if defined(MSWIN)
 				(char_u *)"a",
 #else
 				(char_u *)"",
@@ -2260,7 +2260,7 @@
 			    (char_u *)&p_report, PV_NONE,
 			    {(char_u *)2L, (char_u *)0L} SCTX_INIT},
     {"restorescreen", "rs", P_BOOL|P_VI_DEF,
-#ifdef WIN3264
+#ifdef MSWIN
 			    (char_u *)&p_rs, PV_NONE,
 #else
 			    (char_u *)NULL, PV_NONE,
@@ -2363,7 +2363,7 @@
 #ifdef VMS
 			    (char_u *)"-",
 #else
-# if defined(WIN3264)
+# if defined(MSWIN)
 			    (char_u *)"",	/* set in set_init_1() */
 # else
 			    (char_u *)"sh",
@@ -2429,7 +2429,7 @@
     {"shellxescape", "sxe", P_STRING|P_VI_DEF|P_SECURE,
 			    (char_u *)&p_sxe, PV_NONE,
 			    {
-#if defined(WIN3264)
+#if defined(MSWIN)
 			    (char_u *)"\"&|<>()@^",
 #else
 			    (char_u *)"",
@@ -2720,7 +2720,7 @@
 #endif
 			    SCTX_INIT},
     {"termwintype", "twt",  P_STRING|P_ALLOCED|P_VI_DEF,
-#if defined(WIN3264) && defined(FEAT_TERMINAL)
+#if defined(MSWIN) && defined(FEAT_TERMINAL)
 			    (char_u *)&p_twt, PV_NONE,
 			    {(char_u *)"", (char_u *)NULL}
 #else
@@ -2795,7 +2795,7 @@
 #endif
 			    {(char_u *)"", (char_u *)0L} SCTX_INIT},
     {"toolbar",     "tb",   P_STRING|P_ONECOMMA|P_VI_DEF|P_NODUP,
-#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
 			    (char_u *)&p_toolbar, PV_NONE,
 			    {(char_u *)"icons,tooltips", (char_u *)0L}
 #else
@@ -2857,7 +2857,7 @@
     {"undolevels",  "ul",   P_NUM|P_VI_DEF,
 			    (char_u *)&p_ul, PV_UL,
 			    {
-#if defined(UNIX) || defined(WIN3264) || defined(VMS)
+#if defined(UNIX) || defined(MSWIN) || defined(VMS)
 			    (char_u *)1000L,
 #else
 			    (char_u *)100L,
@@ -3033,7 +3033,7 @@
 			    (char_u *)&p_wmw, PV_NONE,
 			    {(char_u *)1L, (char_u *)0L} SCTX_INIT},
     {"winptydll", NULL,	    P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
-#if defined(WIN3264) && defined(FEAT_TERMINAL)
+#if defined(MSWIN) && defined(FEAT_TERMINAL)
 			    (char_u *)&p_winptydll, PV_NONE, {
 # ifdef _WIN64
 			    (char_u *)"winpty64.dll",
@@ -3209,7 +3209,7 @@
 #ifdef FEAT_SIGNS
 static char *(p_scl_values[]) = {"yes", "no", "auto", NULL};
 #endif
-#if defined(WIN3264) && defined(FEAT_TERMINAL)
+#if defined(MSWIN) && defined(FEAT_TERMINAL)
 static char *(p_twt_values[]) = {"winpty", "conpty", "", NULL};
 #endif
 
@@ -3306,7 +3306,7 @@
     if (((p = mch_getenv((char_u *)"SHELL")) != NULL && *p != NUL)
 #if defined(MSWIN)
 	    || ((p = mch_getenv((char_u *)"COMSPEC")) != NULL && *p != NUL)
-# ifdef WIN3264
+# ifdef MSWIN
 	    || ((p = (char_u *)default_shell()) != NULL && *p != NUL)
 # endif
 #endif
@@ -3575,7 +3575,7 @@
 
     didset_options2();
 
-# if defined(WIN3264) && defined(FEAT_GETTEXT)
+# if defined(MSWIN) && defined(FEAT_GETTEXT)
     /*
      * If $LANG isn't set, try to get a good value for it.  This makes the
      * right language be used automatically.  Don't do this for English.
@@ -3658,7 +3658,7 @@
 	    }
 #endif
 
-#if defined(WIN3264) && !defined(FEAT_GUI)
+#if defined(MSWIN) && !defined(FEAT_GUI)
 	    /* Win32 console: When GetACP() returns a different value from
 	     * GetConsoleCP() set 'termencoding'. */
 	    if (GetACP() != GetConsoleCP())
@@ -3687,7 +3687,7 @@
 		    p_tenc = empty_option;
 	    }
 #endif
-#if defined(WIN3264)
+#if defined(MSWIN)
 	    /* $HOME may have characters in active code page. */
 	    init_homedir();
 #endif
@@ -3922,7 +3922,7 @@
     set_number_default("window", Rows - 1);
 
     /* For DOS console the default is always black. */
-#if !((defined(WIN3264)) && !defined(FEAT_GUI))
+#if !((defined(MSWIN)) && !defined(FEAT_GUI))
     /*
      * If 'background' wasn't set by the user, try guessing the value,
      * depending on the terminal name.  Only need to check for terminals
@@ -3965,7 +3965,7 @@
     static char_u *
 term_bg_default(void)
 {
-#if defined(WIN3264)
+#if defined(MSWIN)
     /* DOS console is nearly always black */
     return (char_u *)"dark";
 #else
@@ -3990,7 +3990,7 @@
     void
 set_init_3(void)
 {
-#if defined(UNIX) || defined(WIN3264)
+#if defined(UNIX) || defined(MSWIN)
 /*
  * Set 'shellpipe' and 'shellredir', depending on the 'shell' option.
  * This is done after other initializations, where 'shell' might have been
@@ -4025,7 +4025,7 @@
 	 */
 	if (	   fnamecmp(p, "csh") == 0
 		|| fnamecmp(p, "tcsh") == 0
-# if defined(WIN3264)	/* also check with .exe extension */
+# if defined(MSWIN)	// also check with .exe extension
 		|| fnamecmp(p, "csh.exe") == 0
 		|| fnamecmp(p, "tcsh.exe") == 0
 # endif
@@ -4034,7 +4034,7 @@
 # if defined(FEAT_QUICKFIX)
 	    if (do_sp)
 	    {
-#  ifdef WIN3264
+#  ifdef MSWIN
 		p_sp = (char_u *)">&";
 #  else
 		p_sp = (char_u *)"|& tee";
@@ -4058,7 +4058,7 @@
 		    || fnamecmp(p, "zsh-beta") == 0
 		    || fnamecmp(p, "bash") == 0
 		    || fnamecmp(p, "fish") == 0
-# ifdef WIN3264
+# ifdef MSWIN
 		    || fnamecmp(p, "cmd") == 0
 		    || fnamecmp(p, "sh.exe") == 0
 		    || fnamecmp(p, "ksh.exe") == 0
@@ -4074,7 +4074,7 @@
 # if defined(FEAT_QUICKFIX)
 		if (do_sp)
 		{
-#  ifdef WIN3264
+#  ifdef MSWIN
 		    p_sp = (char_u *)">%s 2>&1";
 #  else
 		    p_sp = (char_u *)"2>&1| tee";
@@ -4092,7 +4092,7 @@
     }
 #endif
 
-#if defined(WIN3264)
+#if defined(MSWIN)
     /*
      * Set 'shellcmdflag', 'shellxquote', and 'shellquote' depending on the
      * 'shell' option.
@@ -5553,7 +5553,7 @@
     (void)compile_cap_prog(curwin->w_s);
     (void)did_set_spell_option(TRUE);
 #endif
-#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
     (void)opt_strings_flags(p_toolbar, p_toolbar_values, &toolbar_flags, TRUE);
 #endif
 #if defined(FEAT_TOOLBAR) && defined(FEAT_GUI_GTK)
@@ -6403,7 +6403,7 @@
 		}
 	    }
 
-#if defined(WIN3264)
+#if defined(MSWIN)
 	    /* $HOME may have characters in active code page. */
 	    if (varp == &p_enc)
 		init_homedir();
@@ -6810,7 +6810,7 @@
 	{
 	    out_str(T_ME);
 	    redraw_later(CLEAR);
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 	    /* Since t_me has been set, this probably means that the user
 	     * wants to use this as default colors.  Need to reset default
 	     * background/foreground colors. */
@@ -7228,7 +7228,7 @@
 #endif
 
 
-#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
     /* 'toolbar' */
     else if (varp == &p_toolbar)
     {
@@ -7498,7 +7498,7 @@
 		errmsg = e_invarg;
 	}
     }
-# if defined(WIN3264)
+# if defined(MSWIN)
     // 'termwintype'
     else if (varp == &p_twt)
     {
diff --git a/src/option.h b/src/option.h
index 2f1d322..7824520 100644
--- a/src/option.h
+++ b/src/option.h
@@ -18,7 +18,7 @@
 #ifdef AMIGA
 # define DFLT_EFM	"%f>%l:%c:%t:%n:%m,%f:%l: %t%*\\D%n: %m,%f %l %t%*\\D%n: %m,%*[^\"]\"%f\"%*\\D%l: %m,%f:%l:%m,%f|%l| %m"
 #else
-# if defined(WIN3264)
+# if defined(MSWIN)
 #  define DFLT_EFM	"%f(%l) \\=: %t%*\\D%n: %m,%*[^\"]\"%f\"%*\\D%l: %m,%f(%l) \\=: %m,%*[^ ] %f %l: %m,%f:%l:%c:%m,%f(%l):%m,%f:%l:%m,%f|%l| %m"
 # else
 #  if defined(__QNX__)
@@ -546,10 +546,6 @@
 #ifdef FEAT_RIGHTLEFT
 EXTERN int	p_hkmap;	/* 'hkmap' */
 EXTERN int	p_hkmapp;	/* 'hkmapp' */
-# ifdef FEAT_FKMAP
-EXTERN int	p_fkmap;	/* 'fkmap' */
-EXTERN int	p_altkeymap;	/* 'altkeymap' */
-# endif
 # ifdef FEAT_ARABIC
 EXTERN int	p_arshape;	/* 'arabicshape' */
 # endif
@@ -694,7 +690,7 @@
 #if defined(FEAT_QUICKFIX)
 EXTERN long	p_pvh;		/* 'previewheight' */
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
 EXTERN int	p_rs;		/* 'restorescreen' */
 #endif
 #ifdef FEAT_RIGHTLEFT
@@ -827,7 +823,7 @@
 #ifdef FEAT_TERMGUICOLORS
 EXTERN int	p_tgc;		/* 'termguicolors' */
 #endif
-#if defined(WIN3264) && defined(FEAT_TERMINAL)
+#if defined(MSWIN) && defined(FEAT_TERMINAL)
 EXTERN char_u	*p_twt;		// 'termwintype'
 #endif
 EXTERN int	p_terse;	/* 'terse' */
@@ -848,7 +844,7 @@
 EXTERN long	p_ttm;		/* 'ttimeoutlen' */
 EXTERN int	p_tbi;		/* 'ttybuiltin' */
 EXTERN int	p_tf;		/* 'ttyfast' */
-#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
 EXTERN char_u	*p_toolbar;	/* 'toolbar' */
 EXTERN unsigned toolbar_flags;
 # ifdef IN_OPTION_C
@@ -945,7 +941,7 @@
 EXTERN long	p_wmh;		/* 'winminheight' */
 EXTERN long	p_wmw;		/* 'winminwidth' */
 EXTERN long	p_wiw;		/* 'winwidth' */
-#if defined(WIN3264) && defined(FEAT_TERMINAL)
+#if defined(MSWIN) && defined(FEAT_TERMINAL)
 EXTERN char_u	*p_winptydll;	/* 'winptydll' */
 #endif
 EXTERN int	p_ws;		/* 'wrapscan' */
diff --git a/src/os_mswin.c b/src/os_mswin.c
index 9da72b0..27a2cc6 100644
--- a/src/os_mswin.c
+++ b/src/os_mswin.c
@@ -32,7 +32,7 @@
 #endif
 
 #ifndef PROTO
-# if defined(FEAT_TITLE) && !defined(FEAT_GUI_W32)
+# if defined(FEAT_TITLE) && !defined(FEAT_GUI_MSWIN)
 #  include <shellapi.h>
 # endif
 
@@ -3091,7 +3091,7 @@
     }
     if (STRCMP(name, "*") == 0)
     {
-#if defined(FEAT_GUI_W32)
+#if defined(FEAT_GUI_MSWIN)
 	CHOOSEFONT	cf;
 	/* if name is "*", bring up std font dialog: */
 	vim_memset(&cf, 0, sizeof(cf));
diff --git a/src/os_unix.c b/src/os_unix.c
index 425498c..001f085 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -49,7 +49,7 @@
 #endif
 
 #ifdef __CYGWIN__
-# ifndef WIN32
+# ifndef MSWIN
 #  include <cygwin/version.h>
 #  include <sys/cygwin.h>	/* for cygwin_conv_to_posix_path() and/or
 				 * for cygwin_conv_path() */
diff --git a/src/os_w32exe.c b/src/os_w32exe.c
index f96bff4..197d65d 100644
--- a/src/os_w32exe.c
+++ b/src/os_w32exe.c
@@ -22,7 +22,7 @@
 
 /* cproto doesn't create a prototype for main() */
 int _cdecl
-#if defined(FEAT_GUI_W32)
+#if defined(FEAT_GUI_MSWIN)
 VimMain
 #else
     main
@@ -104,7 +104,7 @@
     pSaveInst = SaveInst;
 # endif
     pmain =
-# if defined(FEAT_GUI_W32)
+# if defined(FEAT_GUI_MSWIN)
     //&& defined(__MINGW32__)
 	VimMain
 # else
diff --git a/src/os_win32.c b/src/os_win32.c
index a392d13..b923315 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -10,7 +10,7 @@
  * os_win32.c
  *
  * Used for both the console version and the Win32 GUI.  A lot of code is for
- * the console version only, so there is a lot of "#ifndef FEAT_GUI_W32".
+ * the console version only, so there is a lot of "#ifndef FEAT_GUI_MSWIN".
  *
  * Win32 (Windows NT and Windows 95) system-dependent routines.
  * Portions lifted from the Win32 SDK samples, the MSDOS-dependent code,
@@ -45,7 +45,7 @@
 #endif
 
 #ifndef PROTO
-# if defined(FEAT_TITLE) && !defined(FEAT_GUI_W32)
+# if defined(FEAT_TITLE) && !defined(FEAT_GUI_MSWIN)
 #  include <shellapi.h>
 # endif
 #endif
@@ -151,7 +151,7 @@
 # define wcsicmp(a, b) wcscmpi((a), (b))
 #endif
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 /* Win32 Console handles for input and output */
 static HANDLE g_hConIn  = INVALID_HANDLE_VALUE;
 static HANDLE g_hConOut = INVALID_HANDLE_VALUE;
@@ -193,7 +193,7 @@
 static int conpty_stable = 0;
 static void vtp_flag_init();
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 static int vtp_working = 0;
 static void vtp_init();
 static void vtp_exit();
@@ -227,7 +227,7 @@
 # define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
 #endif
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 static int suppress_winsize = 1;	/* don't fiddle with console */
 #endif
 
@@ -235,7 +235,7 @@
 
 static BOOL win8_or_later = FALSE;
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 /* Dynamic loading for portability */
 typedef struct _DYN_CONSOLE_SCREEN_BUFFER_INFOEX
 {
@@ -284,7 +284,7 @@
     return ver;
 }
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 /*
  * Version of ReadConsoleInput() that works with IME.
  * Works around problems on Windows 8.
@@ -830,7 +830,7 @@
     }
 }
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 
 #define SHIFT  (SHIFT_PRESSED)
 #define CTRL   (RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED)
@@ -1122,7 +1122,7 @@
 # pragma optimize("", on)
 #endif
 
-#endif /* FEAT_GUI_W32 */
+#endif /* FEAT_GUI_MSWIN */
 
 
 #ifdef FEAT_MOUSE
@@ -1130,7 +1130,7 @@
 /*
  * For the GUI the mouse handling is in gui_w32.c.
  */
-# ifdef FEAT_GUI_W32
+# ifdef FEAT_GUI_MSWIN
     void
 mch_setmouse(int on UNUSED)
 {
@@ -1441,7 +1441,7 @@
     return TRUE;
 }
 
-# endif /* FEAT_GUI_W32 */
+# endif /* FEAT_GUI_MSWIN */
 #endif /* FEAT_MOUSE */
 
 
@@ -1481,7 +1481,7 @@
 }
 #endif
 
-#ifndef FEAT_GUI_W32	    /* this isn't used for the GUI */
+#ifndef FEAT_GUI_MSWIN	    /* this isn't used for the GUI */
 /*
  * Handle FOCUS_EVENT.
  */
@@ -1775,7 +1775,7 @@
 #endif
     }
 }
-#endif /* !FEAT_GUI_W32 */
+#endif /* !FEAT_GUI_MSWIN */
 
 
 /*
@@ -1793,7 +1793,7 @@
     long	time UNUSED,
     int		tb_change_cnt UNUSED)
 {
-#ifndef FEAT_GUI_W32	    /* this isn't used for the GUI */
+#ifndef FEAT_GUI_MSWIN	    /* this isn't used for the GUI */
 
     int		len;
     int		c;
@@ -2006,9 +2006,9 @@
     }
     return len;
 
-#else /* FEAT_GUI_W32 */
+#else /* FEAT_GUI_MSWIN */
     return 0;
-#endif /* FEAT_GUI_W32 */
+#endif /* FEAT_GUI_MSWIN */
 }
 
 #ifndef PROTO
@@ -2123,7 +2123,7 @@
 # define SET_INVALID_PARAM_HANDLER
 #endif
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 
 /*
  * GUI version of mch_init().
@@ -2196,7 +2196,7 @@
 }
 
 
-#else /* FEAT_GUI_W32 */
+#else /* FEAT_GUI_MSWIN */
 
 #define SRWIDTH(sr) ((sr).Right - (sr).Left + 1)
 #define SRHEIGHT(sr) ((sr).Bottom - (sr).Top + 1)
@@ -2751,7 +2751,7 @@
 
     exit(r);
 }
-#endif /* !FEAT_GUI_W32 */
+#endif /* !FEAT_GUI_MSWIN */
 
 /*
  * Do we have an interactive window?
@@ -2763,7 +2763,7 @@
 {
     get_exe_name();
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
     return OK;	    /* GUI always has a tty */
 #else
     if (isatty(1))
@@ -3852,7 +3852,7 @@
 #endif
 }
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 
 /*
  * handler for ctrl-break, ctrl-c interrupts, and fatal events.
@@ -4168,7 +4168,7 @@
     }
     suppress_winsize = 0;
 }
-#endif /* FEAT_GUI_W32 */
+#endif /* FEAT_GUI_MSWIN */
 
     static BOOL
 vim_create_process(
@@ -4249,7 +4249,7 @@
 }
 
 
-#if defined(FEAT_GUI_W32) || defined(PROTO)
+#if defined(FEAT_GUI_MSWIN) || defined(PROTO)
 
 /*
  * Specialised version of system() for Win32 GUI mode.
@@ -5124,7 +5124,7 @@
 	    else
 	    {
 		x = -1;
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 		emsg(_("E371: Command not found"));
 #endif
 	    }
@@ -5144,7 +5144,7 @@
 	else
 	{
 	    cmdlen = (
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 		(!p_stmp ? 0 : STRLEN(vimrun_path)) +
 #endif
 		STRLEN(p_sh) + STRLEN(p_shcf) + STRLEN(cmd) + 10);
@@ -5152,7 +5152,7 @@
 	    newcmd = lalloc(cmdlen, TRUE);
 	    if (newcmd != NULL)
 	    {
-#if defined(FEAT_GUI_W32)
+#if defined(FEAT_GUI_MSWIN)
 		if (need_vimrun_warning)
 		{
 		    char *msg = _("VIMRUN.EXE not found in your $PATH.\n"
@@ -5196,7 +5196,7 @@
 
     /* Print the return value, unless "vimrun" was used. */
     if (x != 0 && !(options & SHELL_SILENT) && !emsg_silent
-#if defined(FEAT_GUI_W32)
+#if defined(FEAT_GUI_MSWIN)
 		&& ((options & SHELL_DOOUT) || s_dont_use_vimrun || !p_stmp)
 #endif
 	    )
@@ -5736,7 +5736,7 @@
 #endif
 
 
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
 
 /*
  * Start termcap mode
@@ -5852,10 +5852,10 @@
 
     g_fTermcapMode = FALSE;
 }
-#endif /* FEAT_GUI_W32 */
+#endif /* FEAT_GUI_MSWIN */
 
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
     void
 mch_write(
     char_u  *s UNUSED,
@@ -6692,7 +6692,7 @@
 #endif
 }
 
-#endif /* FEAT_GUI_W32 */
+#endif /* FEAT_GUI_MSWIN */
 
 
 /*
@@ -6703,7 +6703,7 @@
     long    msec,
     int	    ignoreinput UNUSED)
 {
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
     Sleep((int)msec);	    /* never wait for input */
 #else /* Console */
     if (ignoreinput)
@@ -6771,7 +6771,7 @@
     void
 mch_breakcheck(int force)
 {
-#ifndef FEAT_GUI_W32	    /* never used */
+#ifndef FEAT_GUI_MSWIN	    /* never used */
     if (g_fCtrlCPressed || g_fCBrkPressed)
     {
 	ctrl_break_was_pressed = g_fCBrkPressed;
@@ -7696,7 +7696,7 @@
 vtp_flag_init(void)
 {
     DWORD   ver = get_build_number();
-#ifndef FEAT_GUI_W32
+#ifndef FEAT_GUI_MSWIN
     DWORD   mode;
     HANDLE  out;
 
@@ -7716,7 +7716,7 @@
 
 }
 
-#if !defined(FEAT_GUI_W32) || defined(PROTO)
+#if !defined(FEAT_GUI_MSWIN) || defined(PROTO)
 
     static void
 vtp_init(void)
@@ -7941,7 +7941,7 @@
     return conpty_stable;
 }
 
-#if !defined(FEAT_GUI_W32) || defined(PROTO)
+#if !defined(FEAT_GUI_MSWIN) || defined(PROTO)
     void
 resize_console_buf(void)
 {
diff --git a/src/os_win32.h b/src/os_win32.h
index 6c4a349..6ebe037 100644
--- a/src/os_win32.h
+++ b/src/os_win32.h
@@ -70,7 +70,7 @@
 #if defined(__DATE__) && defined(__TIME__)
 # define HAVE_DATE_TIME
 #endif
-#ifndef FEAT_GUI_W32		/* GUI works different */
+#ifndef FEAT_GUI_MSWIN		/* GUI works different */
 # define BREAKCHECK_SKIP    1	/* call mch_breakcheck() each time, it's fast */
 #endif
 
@@ -78,7 +78,7 @@
 
 #define HAVE_PUTENV		/* at least Bcc 5.2 and MSC have it */
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 # define NO_CONSOLE		/* don't included console-only code */
 #endif
 
diff --git a/src/proto.h b/src/proto.h
index c19d155..43192ff 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -38,7 +38,7 @@
 # if defined(UNIX) || defined(VMS)
 #  include "os_unix.pro"
 # endif
-# ifdef WIN3264
+# ifdef MSWIN
 #  include "os_win32.pro"
 #  include "os_mswin.pro"
 #  include "winclip.pro"
@@ -266,7 +266,7 @@
 extern char_u *vimpty_getenv(const char_u *string);	/* in misc2.c */
 #   endif
 #  endif
-#  ifdef FEAT_GUI_W32
+#  ifdef FEAT_GUI_MSWIN
 #   include "gui_w32.pro"
 #  endif
 #  ifdef FEAT_GUI_GTK
diff --git a/src/screen.c b/src/screen.c
index d06cc3f..4973b51 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -7974,7 +7974,7 @@
 
     screen_attr = attr;
     if (full_screen
-#ifdef WIN3264
+#ifdef MSWIN
 		    && termcap_active
 #endif
 				       )
@@ -8081,7 +8081,7 @@
     int	    do_ME = FALSE;	    /* output T_ME code */
 
     if (screen_attr != 0
-#ifdef WIN3264
+#ifdef MSWIN
 			&& termcap_active
 #endif
 					   )
diff --git a/src/search.c b/src/search.c
index 9a47ed4..20f6299 100644
--- a/src/search.c
+++ b/src/search.c
@@ -1246,7 +1246,7 @@
     }
     if (options & SEARCH_REV)
     {
-#ifdef WIN32
+#ifdef MSWIN
 	/* There is a bug in the Visual C++ 2.2 compiler which means that
 	 * dirc always ends up being '/' */
 	dirc = (dirc == '/')  ?  '?'  :  '/';
diff --git a/src/structs.h b/src/structs.h
index fdef811..ab84eae 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1073,7 +1073,7 @@
 {
     int		vc_type;	/* zero or one of the CONV_ values */
     int		vc_factor;	/* max. expansion factor */
-# ifdef WIN3264
+# ifdef MSWIN
     int		vc_cpfrom;	/* codepage to convert from (CONV_CODEPAGE) */
     int		vc_cpto;	/* codepage to convert to (CONV_CODEPAGE) */
 # endif
@@ -1101,7 +1101,7 @@
 #define CONV_TO_LATIN1		3
 #define CONV_TO_LATIN9		4
 #define CONV_ICONV		5
-#ifdef WIN3264
+#ifdef MSWIN
 # define CONV_CODEPAGE		10	/* codepage -> codepage */
 #endif
 #ifdef MACOS_X
@@ -1187,7 +1187,7 @@
 
 #ifdef FEAT_NUM64
 /* Use 64-bit Number. */
-# ifdef WIN3264
+# ifdef MSWIN
 #  ifdef PROTO
 typedef long		    varnumber_T;
 typedef unsigned long	    uvarnumber_T;
@@ -1543,7 +1543,7 @@
 #ifdef UNIX
     pid_t	jv_pid;
 #endif
-#ifdef WIN32
+#ifdef MSWIN
     PROCESS_INFORMATION	jv_proc_info;
     HANDLE		jv_job_object;
 #endif
@@ -1554,7 +1554,7 @@
 #ifdef UNIX
     char_u	*jv_termsig;	/* allocated */
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
     char_u	*jv_tty_type;	// allocated
 #endif
     int		jv_exitval;
@@ -1670,7 +1670,7 @@
      * message when the deadline was set.  If it gets longer (something was
      * received) the deadline is reset. */
     size_t	ch_wait_len;
-#ifdef WIN32
+#ifdef MSWIN
     DWORD	ch_deadline;
 #else
     struct timeval ch_deadline;
@@ -1720,7 +1720,7 @@
 				/* callback for Netbeans when channel is
 				 * closed */
 
-#ifdef WIN32
+#ifdef MSWIN
     int		ch_named_pipe;	/* using named pipe instead of pty */
 #endif
     char_u	*ch_callback;	/* call when any msg is not handled */
@@ -3225,7 +3225,7 @@
 #ifdef FEAT_BEVAL_TIP
     BalloonEval *tip;		    /* tooltip for this menu item */
 #endif
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
     UINT	id;		    /* Id of menu item */
     HMENU	submenu_id;	    /* If this is submenu, add children here */
     HWND	tearoff_handle;	    /* hWnd of tearoff if created */
diff --git a/src/syntax.c b/src/syntax.c
index 16c75f2..df351a3 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -8274,7 +8274,7 @@
     void
 restore_cterm_colors(void)
 {
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
     /* Since t_me has been set, this probably means that the user
      * wants to use this as default colors.  Need to reset default
      * background/foreground colors. */
@@ -9559,7 +9559,7 @@
 	at_en.ae_u.cterm.fg_color = sgp->sg_cterm_fg;
 	at_en.ae_u.cterm.bg_color = sgp->sg_cterm_bg;
 # ifdef FEAT_TERMGUICOLORS
-#  ifdef WIN3264
+#  ifdef MSWIN
 	{
 	    int id;
 	    guicolor_T fg, bg;
@@ -9822,8 +9822,8 @@
 }
 #endif
 
-#if (defined(WIN3264) \
-	&& !defined(FEAT_GUI_W32) \
+#if (defined(MSWIN) \
+	&& !defined(FEAT_GUI_MSWIN) \
 	&& defined(FEAT_TERMGUICOLORS)) || defined(PROTO)
     void
 syn_id2cterm_bg(int hl_id, int *fgp, int *bgp)
diff --git a/src/term.c b/src/term.c
index 9eebd28..8ee9264 100644
--- a/src/term.c
+++ b/src/term.c
@@ -533,7 +533,7 @@
     {K_PAGEUP,		"\316I"},
 # endif
 
-# if defined(WIN3264) || defined(ALL_BUILTIN_TCAPS)
+# if defined(MSWIN) || defined(ALL_BUILTIN_TCAPS)
 /*
  * These codes are valid for the Win32 Console .  The entries that start with
  * ESC | are translated into console calls in os_win32.c.  The function keys
@@ -2036,7 +2036,7 @@
 	/* termcap failed to report size */
 	/* set defaults, in case ui_get_shellsize() also fails */
 	width = 80;
-#if defined(WIN3264)
+#if defined(MSWIN)
 	height = 25;	    /* console is often 25 lines */
 #else
 	height = 24;	    /* most terminals are 24 lines */
@@ -4082,7 +4082,7 @@
 	return;
     }
 
-#if defined(WIN3264) && !defined(FEAT_GUI)
+#if defined(MSWIN) && !defined(FEAT_GUI)
     s = vim_strnsave(string, (int)STRLEN(string) + 1);
 #else
     s = vim_strsave(string);
@@ -4097,7 +4097,7 @@
 	s[0] = term_7to8bit(string);
     }
 
-#if defined(WIN3264) && !defined(FEAT_GUI)
+#if defined(MSWIN) && !defined(FEAT_GUI)
     if (s[0] == K_NUL)
     {
 	STRMOVE(s + 1, s);
@@ -6721,7 +6721,7 @@
 }
 #endif
 
-#if (defined(WIN3264) && !defined(FEAT_GUI)) || defined(PROTO)
+#if (defined(MSWIN) && !defined(FEAT_GUI)) || defined(PROTO)
 static char ksme_str[20];
 static char ksmr_str[20];
 static char ksmd_str[20];
@@ -6917,7 +6917,7 @@
     /* On MS-Windows an RGB macro is available and it produces 0x00bbggrr color
      * values as used by the MS-Windows GDI api.  It should be used only for
      * MS-Windows GDI builds. */
-# if defined(RGB) && defined(WIN32) && !defined(FEAT_GUI)
+# if defined(RGB) && defined(MSWIN) && !defined(FEAT_GUI)
 #  undef RGB
 # endif
 # ifndef RGB
@@ -7085,7 +7085,7 @@
 }
 #endif
 
-#if (defined(WIN3264) && !defined(FEAT_GUI_W32)) || defined(FEAT_TERMINAL) \
+#if (defined(MSWIN) && !defined(FEAT_GUI_MSWIN)) || defined(FEAT_TERMINAL) \
 	|| defined(PROTO)
 static int cube_value[] = {
     0x00, 0x5F, 0x87, 0xAF, 0xD7, 0xFF
@@ -7162,3 +7162,4 @@
     }
 }
 #endif
+
diff --git a/src/terminal.c b/src/terminal.c
index 899d3b6..7e67314 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -66,7 +66,7 @@
     char_u	*sb_text;	// for tl_scrollback_postponed
 } sb_line_T;
 
-#ifdef WIN3264
+#ifdef MSWIN
 # ifndef HPCON
 #  define HPCON VOID*
 # endif
@@ -112,7 +112,7 @@
 
     char_u	*tl_arg0_cmd;	// To format the status bar
 
-#ifdef WIN3264
+#ifdef MSWIN
     void	*tl_winpty_config;
     void	*tl_winpty;
 
@@ -172,7 +172,7 @@
 /* Terminal active in terminal_loop(). */
 static term_T *in_terminal_loop = NULL;
 
-#ifdef WIN3264
+#ifdef MSWIN
 static BOOL has_winpty = FALSE;
 static BOOL has_conpty = FALSE;
 #endif
@@ -324,7 +324,7 @@
     static void
 setup_job_options(jobopt_T *opt, int rows, int cols)
 {
-#ifndef WIN3264
+#ifndef MSWIN
     /* Win32: Redirecting the job output won't work, thus always connect stdout
      * here. */
     if (!(opt->jo_set & JO_OUT_IO))
@@ -337,7 +337,7 @@
 	opt->jo_set |= JO_OUT_IO + JO_OUT_BUF + JO_OUT_MODIFIABLE;
     }
 
-#ifndef WIN3264
+#ifndef MSWIN
     /* Win32: Redirecting the job output won't work, thus always connect stderr
      * here. */
     if (!(opt->jo_set & JO_ERR_IO))
@@ -570,7 +570,7 @@
     curbuf->b_p_ma = FALSE;
 
     set_term_and_win_size(term);
-#ifdef WIN3264
+#ifdef MSWIN
     mch_memmove(orig_opt.jo_io, opt->jo_io, sizeof(orig_opt.jo_io));
 #endif
     setup_job_options(opt, term->tl_rows, term->tl_cols);
@@ -748,7 +748,7 @@
 	    vim_free(buf);
 	    *p = ' ';
 	}
-#ifdef WIN3264
+#ifdef MSWIN
 	else if ((int)(p - cmd) == 4 && STRNICMP(cmd, "type", 4) == 0
 								 && ep != NULL)
 	{
@@ -824,7 +824,7 @@
     if (fprintf(fd, "terminal ++curwin ++cols=%d ++rows=%d ",
 		term->tl_cols, term->tl_rows) < 0)
 	return FAIL;
-#ifdef WIN3264
+#ifdef MSWIN
     if (fprintf(fd, "++type=%s ", term->tl_job->jv_tty_type) < 0)
 	return FAIL;
 #endif
@@ -932,7 +932,7 @@
 	vim_free(term->tl_opencmd);
 	vim_free(term->tl_eof_chars);
 	vim_free(term->tl_arg0_cmd);
-#ifdef WIN3264
+#ifdef MSWIN
 	if (term->tl_out_fd != NULL)
 	    fclose(term->tl_out_fd);
 #endif
@@ -1027,7 +1027,7 @@
     size_t	len = STRLEN(msg);
     term_T	*term = buffer->b_term;
 
-#ifdef WIN3264
+#ifdef MSWIN
     /* Win32: Cannot redirect output of the job, intercept it here and write to
      * the file. */
     if (term->tl_out_fd != NULL)
@@ -1471,7 +1471,7 @@
     int		empty = (buf->b_ml.ml_flags & ML_EMPTY);
     linenr_T	lnum = buf->b_ml.ml_line_count;
 
-#ifdef WIN3264
+#ifdef MSWIN
     if (!enc_utf8 && enc_codepage > 0)
     {
 	WCHAR   *ret = NULL;
@@ -1875,7 +1875,7 @@
 
     State = TERMINAL;
     got_int = FALSE;
-#ifdef WIN3264
+#ifdef MSWIN
     ctrl_break_was_pressed = FALSE;
 #endif
     c = vgetc();
@@ -2016,7 +2016,7 @@
 	for (item = l->lv_first; item != NULL; item = item->li_next)
 	{
 	    char_u *s = tv_get_string(&item->li_tv);
-#ifdef WIN3264
+#ifdef MSWIN
 	    char_u *tmp = s;
 
 	    if (!enc_utf8 && enc_codepage > 0)
@@ -2036,7 +2036,7 @@
 #endif
 	    channel_send(curbuf->b_term->tl_job->jv_channel, PART_IN,
 						      s, (int)STRLEN(s), NULL);
-#ifdef WIN3264
+#ifdef MSWIN
 	    if (tmp != s)
 		vim_free(s);
 #endif
@@ -2293,7 +2293,7 @@
 	}
 #endif
 
-#ifdef WIN3264
+#ifdef MSWIN
 	/* On Windows winpty handles CTRL-C, don't send a CTRL_C_EVENT.
 	 * Use CTRL-BREAK to kill the job. */
 	if (ctrl_break_was_pressed)
@@ -2370,7 +2370,7 @@
 		goto theend;
 	    }
 	}
-# ifdef WIN3264
+# ifdef MSWIN
 	if (!enc_utf8 && has_mbyte && c >= 0x80)
 	{
 	    WCHAR   wc;
@@ -2719,7 +2719,7 @@
 	    // Empty corrupted data of winpty
 	    else if (STRNCMP("  - ", (char_u *)value->string, 4) == 0)
 		term->tl_title = NULL;
-#ifdef WIN3264
+#ifdef MSWIN
 	    else if (!enc_utf8 && enc_codepage > 0)
 	    {
 		WCHAR   *ret = NULL;
@@ -3072,7 +3072,7 @@
 
 	    VIM_CLEAR(term->tl_title);
 	    VIM_CLEAR(term->tl_status_text);
-#ifdef WIN3264
+#ifdef MSWIN
 	    if (term->tl_out_fd != NULL)
 	    {
 		fclose(term->tl_out_fd);
@@ -3184,7 +3184,7 @@
 		    ScreenLinesUC[off] = NUL;
 		}
 	    }
-#ifdef WIN3264
+#ifdef MSWIN
 	    else if (has_mbyte && c >= 0x80)
 	    {
 		char_u	mb[MB_MAXBYTES+1];
@@ -3557,7 +3557,7 @@
     }
     else
     {
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 	int tmp;
 #endif
 
@@ -3565,7 +3565,7 @@
 	if (cterm_normal_fg_color > 0)
 	{
 	    cterm_color2vterm(cterm_normal_fg_color - 1, fg);
-# if defined(WIN3264) && !defined(FEAT_GUI_W32)
+# if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 	    tmp = fg->red;
 	    fg->red = fg->blue;
 	    fg->blue = tmp;
@@ -3579,7 +3579,7 @@
 	if (cterm_normal_bg_color > 0)
 	{
 	    cterm_color2vterm(cterm_normal_bg_color - 1, bg);
-# if defined(WIN3264) && !defined(FEAT_GUI_W32)
+# if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 	    tmp = bg->red;
 	    bg->red = bg->blue;
 	    bg->blue = tmp;
@@ -3922,7 +3922,7 @@
     /* For unix do not use a blinking cursor.  In an xterm this causes the
      * cursor to blink if it's blinking in the xterm.
      * For Windows we respect the system wide setting. */
-#ifdef WIN3264
+#ifdef MSWIN
     if (GetCaretBlinkTime() == INFINITE)
 	value.boolean = 0;
     else
@@ -5588,7 +5588,7 @@
 					(int)STRLEN(term->tl_eof_chars), NULL);
 		channel_send(ch, PART_IN, (char_u *)"\r", 1, NULL);
 	    }
-# ifdef WIN3264
+# ifdef MSWIN
 	    else
 		/* Default: CTRL-D */
 		channel_send(ch, PART_IN, (char_u *)"\004\r", 2, NULL);
@@ -5604,7 +5604,7 @@
 }
 #endif
 
-# if defined(WIN3264) || defined(PROTO)
+# if defined(MSWIN) || defined(PROTO)
 
 /**************************************
  * 2. MS-Windows implementation.
diff --git a/src/ui.c b/src/ui.c
index 0823d2d..e21e801 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -40,7 +40,7 @@
     /* Don't output anything in silent mode ("ex -s") unless 'verbose' set */
     if (!(silent_mode && p_verbose == 0))
     {
-#if !defined(WIN3264)
+#if !defined(MSWIN)
 	char_u	*tofree = NULL;
 
 	if (output_conv.vc_type != CONV_NONE)
@@ -54,7 +54,7 @@
 
 	mch_write(s, len);
 
-# if !defined(WIN3264)
+# if !defined(MSWIN)
 	if (output_conv.vc_type != CONV_NONE)
 	    vim_free(tofree);
 # endif
@@ -62,7 +62,7 @@
 #endif
 }
 
-#if defined(UNIX) || defined(VMS) || defined(PROTO) || defined(WIN3264)
+#if defined(UNIX) || defined(VMS) || defined(PROTO) || defined(MSWIN)
 /*
  * When executing an external program, there may be some typed characters that
  * are not consumed by it.  Give them back to ui_inchar() and they are stored
@@ -3435,7 +3435,7 @@
 
 #endif /* FEAT_MOUSE */
 
-#if defined(FEAT_GUI) || defined(WIN3264) || defined(PROTO)
+#if defined(FEAT_GUI) || defined(MSWIN) || defined(PROTO)
 /*
  * Called when focus changed.  Used for the GUI or for systems where this can
  * be done in the console (Win32).
diff --git a/src/undo.c b/src/undo.c
index 6b6dd47..b2d1d9f 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -645,7 +645,7 @@
 	u_getbot();
     }
 
-#if !defined(UNIX) && !defined(WIN32)
+#if !defined(UNIX) && !defined(MSWIN)
 	/*
 	 * With Amiga we can't handle big undo's, because
 	 * then u_alloc_line would have to allocate a block larger than 32K
@@ -1740,7 +1740,7 @@
     if (!write_ok)
 	semsg(_("E829: write error in undo file: %s"), file_name);
 
-#if defined(WIN3264)
+#if defined(MSWIN)
     /* Copy file attributes; for systems where this can only be done after
      * closing the file. */
     if (buf->b_ffname != NULL)
diff --git a/src/version.c b/src/version.c
index e042578..5ffbc56 100644
--- a/src/version.c
+++ b/src/version.c
@@ -222,7 +222,7 @@
 #else
 	"-digraphs",
 #endif
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 # ifdef FEAT_DIRECTX
 	"+directx",
 # else
@@ -481,7 +481,7 @@
 #else
 	"-num64",
 #endif
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 # ifdef FEAT_OLE
 	"+ole",
 # else
@@ -700,7 +700,7 @@
 	"-viminfo",
 #endif
 	"+vreplace",
-#ifdef WIN3264
+#ifdef MSWIN
 # ifdef FEAT_VTP
 	"+vtp",
 # else
@@ -740,7 +740,7 @@
 #else
 	"-xim",
 #endif
-#ifdef WIN3264
+#ifdef MSWIN
 # ifdef FEAT_XPM_W32
 	"+xpm_w32",
 # else
@@ -780,6 +780,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    941,
+/**/
     940,
 /**/
     939,
@@ -2852,16 +2854,16 @@
      */
     init_longVersion();
     msg(longVersion);
-#ifdef WIN3264
-# ifdef FEAT_GUI_W32
+#ifdef MSWIN
+# ifdef FEAT_GUI_MSWIN
 #  ifdef _WIN64
     msg_puts(_("\nMS-Windows 64-bit GUI version"));
 #  else
     msg_puts(_("\nMS-Windows 32-bit GUI version"));
 #  endif
-# ifdef FEAT_OLE
+#  ifdef FEAT_OLE
     msg_puts(_(" with OLE support"));
-# endif
+#  endif
 # else
 #  ifdef _WIN64
     msg_puts(_("\nMS-Windows 64-bit console version"));
diff --git a/src/vim.h b/src/vim.h
index be1ec1d..3f7388e 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -11,8 +11,17 @@
 
 #include "protodef.h"
 
-/* use fastcall for Borland, when compiling for Win32 */
-#if defined(__BORLANDC__) && defined(WIN32) && !defined(DEBUG)
+// _WIN32 is defined as 1 when the compilation target is 32-bit or 64-bit.
+// Note: If you want to check for 64-bit use the _WIN64 macro.
+#if defined(WIN32) || defined(_WIN32)
+# define MSWIN
+# ifdef FEAT_GUI
+#  define FEAT_GUI_MSWIN
+# endif
+#endif
+
+// use fastcall for Borland, when compiling for MS-Windows
+#if defined(__BORLANDC__) && defined(MSWIN) && !defined(DEBUG)
 #if defined(FEAT_PERL) || \
     defined(FEAT_PYTHON) || \
     defined(FEAT_PYTHON3) || \
@@ -29,7 +38,7 @@
 # endif
 #endif
 
-#if defined(WIN32) || defined(_WIN64)
+#ifdef MSWIN
 # include "vimio.h"
 #endif
 
@@ -103,7 +112,7 @@
     || defined(FEAT_GUI_GTK) \
     || defined(FEAT_GUI_ATHENA) \
     || defined(FEAT_GUI_MAC) \
-    || defined(FEAT_GUI_W32) \
+    || defined(FEAT_GUI_MSWIN) \
     || defined(FEAT_GUI_PHOTON)
 # define FEAT_GUI_ENABLED  /* also defined with NO_X11_INCLUDES */
 # if !defined(FEAT_GUI) && !defined(NO_X11_INCLUDES)
@@ -124,22 +133,11 @@
 # define _CRT_NONSTDC_NO_DEPRECATE
 #endif
 
-#if defined(FEAT_GUI_W32)
-# define FEAT_GUI_MSWIN
-#endif
-#if defined(WIN32) || defined(_WIN64)
-# define MSWIN
-#endif
-/* Practically everything is common to both Win32 and Win64 */
-#if defined(WIN32) || defined(_WIN64)
-# define WIN3264
-#endif
-
 /*
  * VIM_SIZEOF_INT is used in feature.h, and the system-specific included files
  * need items from feature.h.  Therefore define VIM_SIZEOF_INT here.
  */
-#ifdef WIN3264
+#ifdef MSWIN
 # define VIM_SIZEOF_INT 4
 #endif
 
@@ -276,7 +274,7 @@
 # include "os_amiga.h"
 #endif
 
-#ifdef WIN3264
+#ifdef MSWIN
 # include "os_win32.h"
 #endif
 
@@ -456,8 +454,7 @@
 # include <sys/stat.h>
 #endif
 
-#if defined(HAVE_ERRNO_H) \
-	|| defined(WIN32) || defined(_WIN64)
+#if defined(HAVE_ERRNO_H) || defined(MSWIN)
 # include <errno.h>
 #endif
 
@@ -509,7 +506,7 @@
 #ifndef HAVE_SELECT
 # ifdef HAVE_SYS_POLL_H
 #  include <sys/poll.h>
-# elif defined(WIN32)
+# elif defined(MSWIN)
 #  define HAVE_SELECT
 # else
 #  ifdef HAVE_POLL_H
@@ -1752,7 +1749,7 @@
 #define MB_MAXBYTES	21
 
 #if (defined(FEAT_PROFILE) || defined(FEAT_RELTIME)) && !defined(PROTO)
-# ifdef WIN3264
+# ifdef MSWIN
 typedef LARGE_INTEGER proftime_T;
 # else
 typedef struct timeval proftime_T;
@@ -1769,7 +1766,7 @@
 #ifdef PROTO
 typedef long  time_T;
 #else
-# ifdef WIN3264
+# ifdef MSWIN
 typedef __time64_t  time_T;
 # else
 typedef time_t	    time_T;
@@ -2005,7 +2002,7 @@
 # define SELECT_MODE_WORD	1
 # define SELECT_MODE_LINE	2
 
-# ifdef FEAT_GUI_W32
+# ifdef FEAT_GUI_MSWIN
 #  ifdef FEAT_OLE
 #   define WM_OLE (WM_APP+0)
 #  endif
@@ -2103,7 +2100,7 @@
 #endif
 
 # if defined(FEAT_EVAL) \
-	&& (!defined(FEAT_GUI_W32) \
+	&& (!defined(FEAT_GUI_MSWIN) \
 	     || !(defined(FEAT_MBYTE_IME) || defined(GLOBAL_IME))) \
 	&& !(defined(FEAT_GUI_MAC) && defined(MACOS_CONVERT))
 /* Whether IME is supported by im_get_status() defined in mbyte.c.
@@ -2115,7 +2112,7 @@
 
 #if defined(FEAT_XIM) \
 	|| defined(IME_WITHOUT_XIM) \
-	|| (defined(FEAT_GUI_W32) \
+	|| (defined(FEAT_GUI_MSWIN) \
 	    && (defined(FEAT_MBYTE_IME) || defined(GLOBAL_IME))) \
 	|| defined(FEAT_GUI_MAC)
 /* im_set_active() is available */
@@ -2129,7 +2126,7 @@
 
 /* This must come after including proto.h.
  * For VMS this is defined in macros.h. */
-#if !defined(WIN3264) && !defined(VMS)
+#if !defined(MSWIN) && !defined(VMS)
 # define mch_open(n, m, p)	open((n), (m), (p))
 # define mch_fopen(n, p)	fopen((n), (p))
 #endif
@@ -2169,7 +2166,7 @@
 #endif
 
 /* stop using fastcall for Borland */
-#if defined(__BORLANDC__) && defined(WIN32) && !defined(DEBUG)
+#if defined(__BORLANDC__) && defined(MSWIN) && !defined(DEBUG)
  #pragma option -p.
 #endif
 
@@ -2461,7 +2458,7 @@
 # define MAX_OPEN_CHANNELS 0
 #endif
 
-#if defined(WIN32)
+#if defined(MSWIN)
 # define MAX_NAMED_PIPE_SIZE 65535
 #endif
 
@@ -2579,7 +2576,7 @@
 # define ELAPSED_FUNC(v) elapsed(&v)
 typedef struct timeval elapsed_T;
 long elapsed(struct timeval *start_tv);
-#elif defined(WIN32)
+#elif defined(MSWIN)
 # define ELAPSED_TICKCOUNT
 # define ELAPSED_INIT(v) v = GetTickCount()
 # define ELAPSED_FUNC(v) elapsed(v)
diff --git a/src/vim.rc b/src/vim.rc
index 492c74b..c3d3f5f 100644
--- a/src/vim.rc
+++ b/src/vim.rc
@@ -23,7 +23,7 @@
 //
 IDR_VIM		ICON "vim.ico"
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI
 IDR_VIM_ERROR	ICON "vim_error.ico"
 IDR_VIM_ALERT	ICON "vim_alert.ico"
 IDR_VIM_INFO	ICON "vim_info.ico"
@@ -46,7 +46,7 @@
 #endif
 
 CREATEPROCESS_MANIFEST_RESOURCE_ID RT_MANIFEST "gvim.exe.mnf"
-#endif // FEAT_GUI_W32
+#endif // FEAT_GUI
 
 //
 // Type Library
diff --git a/src/winclip.c b/src/winclip.c
index 0285dc5..2d4d97e 100644
--- a/src/winclip.c
+++ b/src/winclip.c
@@ -22,7 +22,7 @@
  * posix environment.
  */
 #ifdef FEAT_CYGWIN_WIN32_CLIPBOARD
-# define WIN3264
+# define MSWIN
 # define WIN32_LEAN_AND_MEAN
 # include <windows.h>
 # include "winclip.pro"
@@ -299,7 +299,7 @@
     VimClipType_t	metadata = { -1, -1, -1, -1 };
     HGLOBAL		hMem = NULL;
     char_u		*str = NULL;
-#if defined(WIN3264)
+#if defined(MSWIN)
     char_u		*to_free = NULL;
 #endif
     HGLOBAL		rawh = NULL;
@@ -361,7 +361,7 @@
     }
     if (str == NULL)
     {
-#if defined(WIN3264)
+#if defined(MSWIN)
 	/* Try to get the clipboard in Unicode if it's not an empty string. */
 	if (IsClipboardFormatAvailable(CF_UNICODETEXT) && metadata.ucslen != 0)
 	{
@@ -417,7 +417,7 @@
 			    break;
 		}
 
-#if defined(WIN3264)
+#if defined(MSWIN)
 		/* The text is in the active codepage.  Convert to
 		 * 'encoding', going through UTF-16. */
 		acp_to_enc(str, str_size, &to_free, &maxlen);
@@ -454,7 +454,7 @@
     if (rawh != NULL)
 	GlobalUnlock(rawh);
     CloseClipboard();
-#if defined(WIN3264)
+#if defined(MSWIN)
     vim_free(to_free);
 #endif
 }
@@ -471,7 +471,7 @@
     HGLOBAL		hMemRaw = NULL;
     HGLOBAL		hMem = NULL;
     HGLOBAL		hMemVim = NULL;
-# if defined(WIN3264)
+# if defined(MSWIN)
     HGLOBAL		hMemW = NULL;
 # endif
 
@@ -508,7 +508,7 @@
 	    metadata.rawlen = 0;
     }
 
-# if defined(WIN3264)
+# if defined(MSWIN)
     {
 	WCHAR		*out;
 	int		len = metadata.txtlen;
@@ -590,7 +590,7 @@
 	{
 	    SetClipboardData(cbd->format, hMemVim);
 	    hMemVim = 0;
-# if defined(WIN3264)
+# if defined(MSWIN)
 	    if (hMemW != NULL)
 	    {
 		if (SetClipboardData(CF_UNICODETEXT, hMemW) != NULL)
@@ -611,7 +611,7 @@
 	GlobalFree(hMemRaw);
     if (hMem)
 	GlobalFree(hMem);
-# if defined(WIN3264)
+# if defined(MSWIN)
     if (hMemW)
 	GlobalFree(hMemW);
 # endif
@@ -746,7 +746,7 @@
     return enc_str;
 }
 
-#if defined(WIN3264) || defined(PROTO)
+#if defined(MSWIN) || defined(PROTO)
 /*
  * Convert from the active codepage to 'encoding'.
  * Input is "str[str_size]".