diff --git a/src/gui_photon.c b/src/gui_photon.c
index 06c8a6b..5db0484 100644
--- a/src/gui_photon.c
+++ b/src/gui_photon.c
@@ -13,8 +13,11 @@
 
 #include "vim.h"
 
-#ifdef FEAT_TOOLBAR
-# include <photon/PxImage.h>
+/* cproto fails on missing include files */
+#ifndef PROTO
+# ifdef FEAT_TOOLBAR
+#  include <photon/PxImage.h>
+# endif
 #endif
 
 #if !defined(__QNX__)
diff --git a/src/gui_w16.c b/src/gui_w16.c
index aa287d9..ffb6b89 100644
--- a/src/gui_w16.c
+++ b/src/gui_w16.c
@@ -1521,7 +1521,12 @@
 
 
 #if defined(FEAT_TOOLBAR) || defined(PROTO)
-#include "gui_w3~1.h"
+
+/* cproto fails on missing include files */
+#ifndef PROTO
+# include "gui_w3~1.h"
+#endif
+
 /*
  * Create the toolbar, initially unpopulated.
  *  (just like the menu, there are no defaults, it's all
diff --git a/src/gui_w32.c b/src/gui_w32.c
index 3d8d6c7..04658d6 100644
--- a/src/gui_w32.c
+++ b/src/gui_w32.c
@@ -198,11 +198,17 @@
 static UINT_PTR	    BevalTimerId = 0;
 static DWORD	    LastActivity = 0;
 
+
+/* cproto fails on missing include files */
+#ifndef PROTO
+
 /*
  * excerpts from headers since this may not be presented
  * in the extremely old compilers
  */
-#include <pshpack1.h>
+# include <pshpack1.h>
+
+#endif
 
 typedef struct _DllVersionInfo
 {
@@ -213,7 +219,9 @@
     DWORD dwPlatformID;
 } DLLVERSIONINFO;
 
-#include <poppack.h>
+#ifndef PROTO
+# include <poppack.h>
+#endif
 
 typedef struct tagTOOLINFOA_NEW
 {
diff --git a/src/gui_w48.c b/src/gui_w48.c
index 4d38c15..61c53a7 100644
--- a/src/gui_w48.c
+++ b/src/gui_w48.c
@@ -25,6 +25,10 @@
 #ifdef DEBUG
 # include <tchar.h>
 #endif
+
+/* cproto fails on missing include files */
+#ifndef PROTO
+
 #ifndef __MINGW32__
 # include <shellapi.h>
 #endif
@@ -44,6 +48,8 @@
 # include "glbl_ime.h"
 #endif
 
+#endif /* PROTO */
+
 #ifdef FEAT_MENU
 # define MENUHINTS		/* show menu hints in command line */
 #endif
diff --git a/src/os_amiga.c b/src/os_amiga.c
index e2b1579..0b63ea1 100644
--- a/src/os_amiga.c
+++ b/src/os_amiga.c
@@ -22,6 +22,9 @@
 #undef TRUE		/* will be redefined by exec/types.h */
 #undef FALSE
 
+/* cproto fails on missing include files, skip them */
+#ifndef PROTO
+
 #ifndef LATTICE
 # include <exec/types.h>
 # include <exec/exec.h>
@@ -55,6 +58,8 @@
 # include <libraries/arp_pragmas.h>
 #endif
 
+#endif /* PROTO */
+
 /*
  * At this point TRUE and FALSE are defined as 1L and 0L, but we want 1 and 0.
  */
@@ -283,7 +288,9 @@
 #endif
 }
 
-#include <workbench/startup.h>
+#ifndef PROTO
+# include <workbench/startup.h>
+#endif
 
 /*
  * Check_win checks whether we have an interactive window.
@@ -1002,7 +1009,9 @@
  * Heavely modified by mool.
  */
 
-#include <devices/conunit.h>
+#ifndef PROTO
+# include <devices/conunit.h>
+#endif
 
 /*
  * try to get the real window size
@@ -1129,9 +1138,11 @@
  * say 'oml lib:amiga.lib -r sendpacket.o'
  */
 
+#ifndef PROTO
 /* #include <proto/exec.h> */
 /* #include <proto/dos.h> */
-#include <exec/memory.h>
+# include <exec/memory.h>
+#endif
 
 /*
  * Function - dos_packet written by Phil Lindsay, Carolyn Scheppner, and Andy
diff --git a/src/os_amiga.h b/src/os_amiga.h
index 0395bce..69a1523 100644
--- a/src/os_amiga.h
+++ b/src/os_amiga.h
@@ -56,6 +56,9 @@
 # define TEMPNAMELEN	12
 #endif
 
+/* cproto fails on missing include files */
+#ifndef PROTO
+
 #include <exec/types.h>
 #include <libraries/dos.h>
 #include <libraries/dosextens.h>
@@ -67,6 +70,8 @@
 # include <proto/intuition.h>
 #endif
 
+#endif /* PROTO */
+
 #define FNAME_ILLEGAL ";*?`#%" /* illegal characters in a file name */
 
 /*
@@ -85,6 +90,7 @@
 # include <unistd.h>
 #endif
 
+#ifndef PROTO
 /*
  * arpbase.h must be included before functions.h
  */
@@ -92,6 +98,8 @@
 # include <libraries/arpbase.h>
 #endif
 
+#endif /* PROTO */
+
 /*
  * This won't be needed if you have a version of Lattice 4.01 without broken
  * break signal handling.
diff --git a/src/os_beos.c b/src/os_beos.c
index 10135aa..2eed684 100644
--- a/src/os_beos.c
+++ b/src/os_beos.c
@@ -13,7 +13,10 @@
 
 #include <float.h>
 #include <termios.h>
-#include <kernel/OS.h>
+#ifndef PROTO
+# include <kernel/OS.h>
+#endif
+
 #include "vim.h"
 
 #if USE_THREAD_FOR_INPUT_WITH_TIMEOUT
diff --git a/src/os_beos.h b/src/os_beos.h
index 260834e..e55c389 100644
--- a/src/os_beos.h
+++ b/src/os_beos.h
@@ -22,4 +22,6 @@
 
 /* select emulation */
 
-#include <net/socket.h>		/* for typedefs and #defines only */
+#ifndef PROTO
+# include <net/socket.h>		/* for typedefs and #defines only */
+#endif
diff --git a/src/os_msdos.c b/src/os_msdos.c
index 2d1cf73..209bdd6 100644
--- a/src/os_msdos.c
+++ b/src/os_msdos.c
@@ -23,7 +23,10 @@
 
 #include "vim.h"
 
-#include <conio.h>
+/* cproto fails on missing include files */
+#ifndef PROTO
+# include <conio.h>
+#endif
 
 /*
  * MS-DOS only code, not used for Win16.
@@ -31,17 +34,19 @@
 #ifndef WIN16
 
 
-#include <bios.h>
-#ifdef DJGPP
-# include <dpmi.h>
-# include <signal.h>
-# include <sys/movedata.h>
-# include <crt0.h>
-# ifdef FEAT_CLIPBOARD
-#  include <sys/segments.h>
+#ifndef PROTO
+# include <bios.h>
+# ifdef DJGPP
+#  include <dpmi.h>
+#  include <signal.h>
+#  include <sys/movedata.h>
+#  include <crt0.h>
+#  ifdef FEAT_CLIPBOARD
+#   include <sys/segments.h>
+#  endif
+# else
+#  include <alloc.h>
 # endif
-#else
-# include <alloc.h>
 #endif
 
 #if defined(DJGPP) || defined(PROTO)
@@ -2130,8 +2135,10 @@
 
 #undef setlocale
 
-#include <go32.h>
-#include <inlines/ctype.ha>
+#ifndef PROTO
+# include <go32.h>
+# include <inlines/ctype.ha>
+#endif
 #include <locale.h>
 
 #define UPCASE (__dj_ISALNUM | __dj_ISALPHA | __dj_ISGRAPH | __dj_ISPRINT | __dj_ISUPPER)
diff --git a/src/os_msdos.h b/src/os_msdos.h
index 95578bc..735410f 100644
--- a/src/os_msdos.h
+++ b/src/os_msdos.h
@@ -53,9 +53,12 @@
 
 #define FNAME_ILLEGAL "\"*?><|" /* illegal characters in a file name */
 
-#include <dos.h>
-#include <dir.h>
-#include <time.h>
+/* cproto fails on missing include files */
+#ifndef PROTO
+# include <dos.h>
+# include <dir.h>
+# include <time.h>
+#endif
 
 #ifdef DJGPP
 # include <unistd.h>
diff --git a/src/os_mswin.c b/src/os_mswin.c
index b4f662a..912864f 100644
--- a/src/os_mswin.c
+++ b/src/os_mswin.c
@@ -26,13 +26,18 @@
 
 #ifdef WIN16
 # define SHORT_FNAME		/* always 8.3 file name */
-# include <dos.h>
+/* cproto fails on missing include files */
+# ifndef PROTO
+#  include <dos.h>
+# endif
 # include <string.h>
 #endif
 #include <sys/types.h>
 #include <signal.h>
 #include <limits.h>
-#include <process.h>
+#ifndef PROTO
+# include <process.h>
+#endif
 
 #undef chdir
 #ifdef __GNUC__
@@ -43,19 +48,22 @@
 # include <direct.h>
 #endif
 
-#if defined(FEAT_TITLE) && !defined(FEAT_GUI_W32)
-# include <shellapi.h>
+#ifndef PROTO
+# if defined(FEAT_TITLE) && !defined(FEAT_GUI_W32)
+#  include <shellapi.h>
+# endif
+
+# if defined(FEAT_PRINTER) && !defined(FEAT_POSTSCRIPT)
+#  include <dlgs.h>
+#  ifdef WIN3264
+#   include <winspool.h>
+#  else
+#   include <print.h>
+#  endif
+#  include <commdlg.h>
 #endif
 
-#if defined(FEAT_PRINTER) && !defined(FEAT_POSTSCRIPT)
-# include <dlgs.h>
-# ifdef WIN3264
-#  include <winspool.h>
-# else
-#  include <print.h>
-# endif
-# include <commdlg.h>
-#endif
+#endif /* PROTO */
 
 #ifdef __MINGW32__
 # ifndef FROM_LEFT_1ST_BUTTON_PRESSED
@@ -2410,7 +2418,9 @@
 
 
 #if defined(FEAT_SHORTCUT) || defined(PROTO)
-# include <shlobj.h>
+# ifndef PROTO
+#  include <shlobj.h>
+# endif
 
 /*
  * When "fname" is the name of a shortcut (*.lnk) resolve the file it points
diff --git a/src/os_unix.h b/src/os_unix.h
index 3bb9a89..3c9224c 100644
--- a/src/os_unix.h
+++ b/src/os_unix.h
@@ -198,6 +198,9 @@
 # define HAVE_TOTAL_MEM
 #endif
 
+
+#ifndef PROTO
+
 #ifdef VMS
 # include <unixio.h>
 # include <unixlib.h>
@@ -226,7 +229,11 @@
 # ifdef FEAT_GUI_GTK
 #  include "gui_gtk_vms.h"
 # endif
+#endif
 
+#endif /* PROTO */
+
+#ifdef VMS
 typedef struct dsc$descriptor   DESC;
 #endif
 
diff --git a/src/os_win16.c b/src/os_win16.c
index b620149..49e6e30 100644
--- a/src/os_win16.c
+++ b/src/os_win16.c
@@ -22,16 +22,23 @@
 
 #include "vim.h"
 
-#include <dos.h>
+/* cproto fails on missing include files */
+#ifndef PROTO
+# include <dos.h>
+#endif
+
 #include <string.h>
 #include <sys/types.h>
 #include <signal.h>
 #include <limits.h>
-#include <process.h>
 
-#undef chdir
-#include <direct.h>
-#include <shellapi.h>	/* required for FindExecutable() */
+#ifndef PROTO
+# include <process.h>
+
+# undef chdir
+# include <direct.h>
+# include <shellapi.h>	/* required for FindExecutable() */
+#endif
 
 
 /* Record all output and all keyboard & mouse input */
diff --git a/src/os_win16.h b/src/os_win16.h
index 17f876c..98f0ece 100644
--- a/src/os_win16.h
+++ b/src/os_win16.h
@@ -63,16 +63,21 @@
 
 #include <stdlib.h>
 #include <time.h>
-#include <dos.h>
-#include <dir.h>
 
-#ifndef STRICT
-# define STRICT
-#endif
-#ifndef COBJMACROS
-# define COBJMACROS	/* For OLE: Enable "friendlier" access to objects */
-#endif
-#include <windows.h>
+/* cproto fails on missing include files */
+#ifndef PROTO
+# include <dos.h>
+# include <dir.h>
+
+# ifndef STRICT
+#  define STRICT
+# endif
+# ifndef COBJMACROS
+#  define COBJMACROS	/* For OLE: Enable "friendlier" access to objects */
+# endif
+# include <windows.h>
+
+#endif /* PROTO */
 
 /*
  *  plenty of memory, use large buffers
diff --git a/src/os_win32.c b/src/os_win32.c
index 96e115c..f5e283e 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -29,7 +29,11 @@
 #include <sys/types.h>
 #include <signal.h>
 #include <limits.h>
-#include <process.h>
+
+/* cproto fails on missing include files */
+#ifndef PROTO
+# include <process.h>
+#endif
 
 #undef chdir
 #ifdef __GNUC__
@@ -40,8 +44,10 @@
 # include <direct.h>
 #endif
 
-#if defined(FEAT_TITLE) && !defined(FEAT_GUI_W32)
-# include <shellapi.h>
+#ifndef PROTO
+# if defined(FEAT_TITLE) && !defined(FEAT_GUI_W32)
+#  include <shellapi.h>
+# endif
 #endif
 
 #ifdef __MINGW32__
@@ -125,6 +131,7 @@
 typedef int WORD;
 typedef int WCHAR;
 typedef void VOID;
+typedef int BY_HANDLE_FILE_INFORMATION;
 #endif
 
 #ifndef FEAT_GUI_W32
@@ -152,6 +159,8 @@
 # define wcsicmp(a, b) wcscmpi((a), (b))
 #endif
 
+#ifndef PROTO
+
 /* Enable common dialogs input unicode from IME if posible. */
 #ifdef FEAT_MBYTE
 LRESULT (WINAPI *pDispatchMessage)(LPMSG) = DispatchMessage;
@@ -160,6 +169,8 @@
 BOOL (WINAPI *pPeekMessage)(LPMSG, HWND, UINT, UINT, UINT) = PeekMessage;
 #endif
 
+#endif /* PROTO */
+
 #ifndef FEAT_GUI_W32
 /* Win32 Console handles for input and output */
 static HANDLE g_hConIn  = INVALID_HANDLE_VALUE;
@@ -453,7 +464,10 @@
 DWORD g_PlatformId;
 
 #ifdef HAVE_ACL
-# include <aclapi.h>
+# ifndef PROTO
+#  include <aclapi.h>
+# endif
+
 /*
  * These are needed to dynamically load the ADVAPI DLL, which is not
  * implemented under Windows 95 (and causes VIM to crash)
@@ -1658,8 +1672,10 @@
 #endif /* FEAT_GUI_W32 */
 }
 
-#ifndef __MINGW32__
-# include <shellapi.h>	/* required for FindExecutable() */
+#ifndef PROTO
+# ifndef __MINGW32__
+#  include <shellapi.h>	/* required for FindExecutable() */
+# endif
 #endif
 
 /*
diff --git a/src/os_win32.h b/src/os_win32.h
index c155fb2..71b7609 100644
--- a/src/os_win32.h
+++ b/src/os_win32.h
@@ -12,7 +12,10 @@
 
 #include "os_dos.h"		/* common MS-DOS and Win32 stuff */
 #ifndef __CYGWIN__
-#include <direct.h>		/* for _mkdir() */
+/* cproto fails on missing include files */
+# ifndef PROTO
+#  include <direct.h>		/* for _mkdir() */
+# endif
 #endif
 
 /* Stop the VC2005 compiler from nagging. */
@@ -101,7 +104,9 @@
 #ifndef COBJMACROS
 # define COBJMACROS	/* For OLE: Enable "friendlier" access to objects */
 #endif
-#include <windows.h>
+#ifndef PROTO
+# include <windows.h>
+#endif
 
 /*
  * Win32 has plenty of memory, use large buffers
@@ -194,6 +199,8 @@
 # define vim_mkdir(x, y) mch_mkdir(x)
 #endif
 
+#ifndef PROTO
+
 /* Enable common dialogs input unicode from IME if posible. */
 #ifdef FEAT_MBYTE
     /* The variables are defined in os_win32.c. */
@@ -207,3 +214,5 @@
 # define pIsDialogMessage IsDialogMessage
 # define pPeekMessage PeekMessage
 #endif
+
+#endif /* PROTO */
diff --git a/src/version.c b/src/version.c
index 5e4a16b..232ddbc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -726,6 +726,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    719,
+/**/
     718,
 /**/
     717,
diff --git a/src/vimio.h b/src/vimio.h
index 71a52cd..a4dd030 100644
--- a/src/vimio.h
+++ b/src/vimio.h
@@ -13,4 +13,7 @@
 # define _CRT_NONSTDC_NO_DEPRECATE
 #endif
 
-#include <io.h>
+/* cproto fails on missing include files */
+#ifndef PROTO
+# include <io.h>
+#endif