diff --git a/src/gui_w32.c b/src/gui_w32.c
index 0966afe..4a34cb4 100644
--- a/src/gui_w32.c
+++ b/src/gui_w32.c
@@ -1270,6 +1270,25 @@
 	pGetMonitorInfo = (TGetMonitorInfo)GetProcAddress(user32_lib,
 							  "GetMonitorInfoA");
     }
+
+#ifdef FEAT_MBYTE
+    /* If the OS is Windows NT, use wide functions;
+     * this enables common dialogs input unicode from IME. */
+    if (os_version.dwPlatformId == VER_PLATFORM_WIN32_NT)
+    {
+	pDispatchMessage = DispatchMessageW;
+	pGetMessage = GetMessageW;
+	pIsDialogMessage = IsDialogMessageW;
+	pPeekMessage = PeekMessageW;
+    }
+    else
+    {
+	pDispatchMessage = DispatchMessageA;
+	pGetMessage = GetMessageA;
+	pIsDialogMessage = IsDialogMessageA;
+	pPeekMessage = PeekMessageA;
+    }
+#endif
 }
 
 /*
diff --git a/src/gui_w48.c b/src/gui_w48.c
index 445104d..4667dc7 100644
--- a/src/gui_w48.c
+++ b/src/gui_w48.c
@@ -390,7 +390,7 @@
     KillTimer(NULL, idEvent);
 
     /* Eat spurious WM_TIMER messages */
-    while (PeekMessage(&msg, hwnd, WM_TIMER, WM_TIMER, PM_REMOVE))
+    while (pPeekMessage(&msg, hwnd, WM_TIMER, WM_TIMER, PM_REMOVE))
 	;
 
     if (blink_state == BLINK_ON)
@@ -418,7 +418,7 @@
     {
 	KillTimer(NULL, blink_timer);
 	/* Eat spurious WM_TIMER messages */
-	while (PeekMessage(&msg, s_hwnd, WM_TIMER, WM_TIMER, PM_REMOVE))
+	while (pPeekMessage(&msg, s_hwnd, WM_TIMER, WM_TIMER, PM_REMOVE))
 	    ;
 	blink_timer = 0;
     }
@@ -476,7 +476,7 @@
     s_timed_out = TRUE;
 
     /* Eat spurious WM_TIMER messages */
-    while (PeekMessage(&msg, hwnd, WM_TIMER, WM_TIMER, PM_REMOVE))
+    while (pPeekMessage(&msg, hwnd, WM_TIMER, WM_TIMER, PM_REMOVE))
 	;
     if (idEvent == s_wait_timer)
 	s_wait_timer = 0;
@@ -1707,7 +1707,7 @@
     static char_u k10[] = {K_SPECIAL, 'k', ';', 0};
 #endif
 
-    GetMessage(&msg, NULL, 0, 0);
+    pGetMessage(&msg, NULL, 0, 0);
 
 #ifdef FEAT_OLE
     /* Look after OLE Automation commands */
@@ -1718,7 +1718,7 @@
 	{
 	    /* Message can't be ours, forward it.  Fixes problem with Ultramon
 	     * 3.0.4 */
-	    DispatchMessage(&msg);
+	    pDispatchMessage(&msg);
 	}
 	else
 	{
@@ -1749,14 +1749,14 @@
     if (msg.message == WM_USER)
     {
 	MyTranslateMessage(&msg);
-	DispatchMessage(&msg);
+	pDispatchMessage(&msg);
 	return;
     }
 #endif
 
 #ifdef MSWIN_FIND_REPLACE
     /* Don't process messages used by the dialog */
-    if (s_findrep_hwnd != NULL && IsDialogMessage(s_findrep_hwnd, &msg))
+    if (s_findrep_hwnd != NULL && pIsDialogMessage(s_findrep_hwnd, &msg))
     {
 	HandleMouseHide(msg.message, msg.lParam);
 	return;
@@ -1928,7 +1928,7 @@
     if (vk != VK_F10 || check_map(k10, State, FALSE, TRUE, FALSE,
 							  NULL, NULL) == NULL)
 #endif
-	DispatchMessage(&msg);
+	pDispatchMessage(&msg);
 }
 
 /*
@@ -1943,7 +1943,7 @@
     MSG	    msg;
 
     if (!s_busy_processing)
-	while (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)
+	while (pPeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)
 						  && !vim_is_input_buf_full())
 	    process_message();
 }
@@ -2019,7 +2019,7 @@
 		KillTimer(NULL, s_wait_timer);
 
 		/* Eat spurious WM_TIMER messages */
-		while (PeekMessage(&msg, s_hwnd, WM_TIMER, WM_TIMER, PM_REMOVE))
+		while (pPeekMessage(&msg, s_hwnd, WM_TIMER, WM_TIMER, PM_REMOVE))
 		    ;
 		s_wait_timer = 0;
 	    }
diff --git a/src/os_mswin.c b/src/os_mswin.c
index 1c1348a..49b1428 100644
--- a/src/os_mswin.c
+++ b/src/os_mswin.c
@@ -1856,12 +1856,12 @@
 {
     MSG msg;
 
-    while (!*bUserAbort && PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+    while (!*bUserAbort && pPeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
     {
-	if (!hDlgPrint || !IsDialogMessage(hDlgPrint, &msg))
+	if (!hDlgPrint || !pIsDialogMessage(hDlgPrint, &msg))
 	{
 	    TranslateMessage(&msg);
-	    DispatchMessage(&msg);
+	    pDispatchMessage(&msg);
 	}
     }
     return !*bUserAbort;
@@ -3132,10 +3132,10 @@
 {
     MSG msg;
 
-    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+    while (pPeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
     {
 	TranslateMessage(&msg);
-	DispatchMessage(&msg);
+	pDispatchMessage(&msg);
     }
 }
 
diff --git a/src/os_win32.c b/src/os_win32.c
index 88ead6f..0d8bbf7 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -152,6 +152,14 @@
 # define wcsicmp(a, b) wcscmpi((a), (b))
 #endif
 
+/* Enable common dialogs input unicode from IME if posible. */
+#ifdef FEAT_MBYTE
+LRESULT (WINAPI *pDispatchMessage)(LPMSG) = DispatchMessage;
+BOOL (WINAPI *pGetMessage)(LPMSG, HWND, UINT, UINT) = GetMessage;
+BOOL (WINAPI *pIsDialogMessage)(HWND, LPMSG) = IsDialogMessage;
+BOOL (WINAPI *pPeekMessage)(LPMSG, HWND, UINT, UINT, UINT) = PeekMessage;
+#endif
+
 #ifndef FEAT_GUI_W32
 /* Win32 Console handles for input and output */
 static HANDLE g_hConIn  = INVALID_HANDLE_VALUE;
@@ -3284,10 +3292,10 @@
 	{
 	    MSG	msg;
 
-	    if (PeekMessage(&msg, (HWND)NULL, 0, 0, PM_REMOVE))
+	    if (pPeekMessage(&msg, (HWND)NULL, 0, 0, PM_REMOVE))
 	    {
 		TranslateMessage(&msg);
-		DispatchMessage(&msg);
+		pDispatchMessage(&msg);
 	    }
 	    if (WaitForSingleObject(pi.hProcess, delay) != WAIT_TIMEOUT)
 		break;
diff --git a/src/os_win32.h b/src/os_win32.h
index 41a44bf..5303d6d 100644
--- a/src/os_win32.h
+++ b/src/os_win32.h
@@ -193,3 +193,17 @@
 #else
 # define vim_mkdir(x, y) mch_mkdir(x)
 #endif
+
+/* Enable common dialogs input unicode from IME if posible. */
+#ifdef FEAT_MBYTE
+    /* The variables are defined in os_win32.c. */
+extern LRESULT (WINAPI *pDispatchMessage)(LPMSG);
+extern BOOL (WINAPI *pGetMessage)(LPMSG, HWND, UINT, UINT);
+extern BOOL (WINAPI *pIsDialogMessage)(HWND, LPMSG);
+extern BOOL (WINAPI *pPeekMessage)(LPMSG, HWND, UINT, UINT, UINT);
+#else
+# define pDispatchMessage DispatchMessage
+# define pGetMessage GetMessage
+# define pIsDialogMessage IsDialogMessage
+# define pPeekMessage PeekMessage
+#endif
diff --git a/src/version.c b/src/version.c
index cdbde12..517310e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -710,6 +710,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    277,
+/**/
     276,
 /**/
     275,