diff --git a/src/os_win32.c b/src/os_win32.c
index 89c7c5e..2c5670d 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -195,10 +195,12 @@
 static int vtp_working = 0;
 static void vtp_init();
 static void vtp_exit();
-static int vtp_printf(char *format, ...);
 static void vtp_sgr_bulk(int arg);
 static void vtp_sgr_bulks(int argc, int *argv);
 
+static int wt_working = 0;
+static void wt_init();
+
 static guicolor_T save_console_bg_rgb;
 static guicolor_T save_console_fg_rgb;
 static guicolor_T store_console_bg_rgb;
@@ -214,8 +216,10 @@
 
 # ifdef FEAT_TERMGUICOLORS
 #  define USE_VTP		(vtp_working && is_term_win32() && (p_tgc || (!p_tgc && t_colors >= 256)))
+#  define USE_WT		(wt_working)
 # else
 #  define USE_VTP		0
+#  define USE_WT		0
 # endif
 
 static void set_console_color_rgb(void);
@@ -236,6 +240,12 @@
 
 static BOOL win8_or_later = FALSE;
 
+# if defined(__GNUC__) && !defined(__MINGW32__)  && !defined(__CYGWIN__)
+#  define UChar UnicodeChar
+# else
+#  define UChar uChar.UnicodeChar
+# endif
+
 #if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
 // Dynamic loading for portability
 typedef struct _DYN_CONSOLE_SCREEN_BUFFER_INFOEX
@@ -286,6 +296,30 @@
 }
 
 #if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
+    static BOOL
+is_ambiwidth_event(
+    INPUT_RECORD *ir)
+{
+    return ir->EventType == KEY_EVENT
+		&& ir->Event.KeyEvent.bKeyDown
+		&& ir->Event.KeyEvent.wRepeatCount == 1
+		&& ir->Event.KeyEvent.wVirtualKeyCode == 0x12
+		&& ir->Event.KeyEvent.wVirtualScanCode == 0x38
+		&& ir->Event.KeyEvent.UChar == 0
+		&& ir->Event.KeyEvent.dwControlKeyState == 2;
+}
+
+    static void
+make_ambiwidth_event(
+    INPUT_RECORD *down,
+    INPUT_RECORD *up)
+{
+    down->Event.KeyEvent.wVirtualKeyCode = 0;
+    down->Event.KeyEvent.wVirtualScanCode = 0;
+    down->Event.KeyEvent.UChar = up->Event.KeyEvent.UChar;
+    down->Event.KeyEvent.dwControlKeyState = 0;
+}
+
 /*
  * Version of ReadConsoleInput() that works with IME.
  * Works around problems on Windows 8.
@@ -322,10 +356,12 @@
 
     if (s_dwMax == 0)
     {
-	if (nLength == -1)
+	if (!USE_WT && nLength == -1)
 	    return PeekConsoleInputW(hInput, lpBuffer, 1, lpEvents);
-	if (!ReadConsoleInputW(hInput, s_irCache, IRSIZE, &dwEvents))
-	    return FALSE;
+	GetNumberOfConsoleInputEvents(hInput, &dwEvents);
+	if (dwEvents == 0 && nLength == -1)
+	    return PeekConsoleInputW(hInput, lpBuffer, 1, lpEvents);
+	ReadConsoleInputW(hInput, s_irCache, IRSIZE, &dwEvents);
 	s_dwIndex = 0;
 	s_dwMax = dwEvents;
 	if (dwEvents == 0)
@@ -334,6 +370,10 @@
 	    return TRUE;
 	}
 
+	for (i = s_dwIndex; i < (int)s_dwMax - 1; ++i)
+	    if (is_ambiwidth_event(&s_irCache[i]))
+		make_ambiwidth_event(&s_irCache[i], &s_irCache[i + 1]);
+
 	if (s_dwMax > 1)
 	{
 	    head = 0;
@@ -937,12 +977,6 @@
 };
 
 
-# if defined(__GNUC__) && !defined(__MINGW32__)  && !defined(__CYGWIN__)
-#  define UChar UnicodeChar
-# else
-#  define UChar uChar.UnicodeChar
-# endif
-
 /*
  * The return code indicates key code size.
  */
@@ -2689,6 +2723,7 @@
 
     vtp_flag_init();
     vtp_init();
+    wt_init();
 }
 
 /*
@@ -5781,6 +5816,19 @@
 	    clear_chars(coord, source.Right - source.Left + 1);
 	}
     }
+
+    if (USE_WT)
+    {
+	COORD coord;
+	int i;
+
+	coord.X = source.Left;
+	for (i = source.Top; i < dest.Y; ++i)
+	{
+	    coord.Y = i;
+	    clear_chars(coord, source.Right - source.Left + 1);
+	}
+    }
 }
 
 
@@ -5837,6 +5885,19 @@
 	    clear_chars(coord, source.Right - source.Left + 1);
 	}
     }
+
+    if (USE_WT)
+    {
+	COORD coord;
+	int i;
+
+	coord.X = source.Left;
+	for (i = nb; i <= source.Bottom; ++i)
+	{
+	    coord.Y = i;
+	    clear_chars(coord, source.Right - source.Left + 1);
+	}
+    }
 }
 
 
@@ -7587,7 +7648,7 @@
     restore_console_color_rgb();
 }
 
-    static int
+    int
 vtp_printf(
     char *format,
     ...)
@@ -7760,6 +7821,18 @@
     }
 }
 
+    static void
+wt_init(void)
+{
+    wt_working = (mch_getenv("WT_SESSION") != NULL);
+}
+
+    int
+use_wt(void)
+{
+    return USE_WT;
+}
+
 # ifdef FEAT_TERMGUICOLORS
     static int
 ctermtoxterm(
@@ -7785,6 +7858,13 @@
 
     get_default_console_color(&ctermfg, &ctermbg, &fg, &bg);
 
+    if (USE_WT)
+    {
+	term_fg_rgb_color(fg);
+	term_bg_rgb_color(bg);
+	return;
+    }
+
     fg = (GetRValue(fg) << 16) | (GetGValue(fg) << 8) | GetBValue(fg);
     bg = (GetRValue(bg) << 16) | (GetGValue(bg) << 8) | GetBValue(bg);
 
@@ -7858,6 +7938,9 @@
 # ifdef FEAT_TERMGUICOLORS
     DYN_CONSOLE_SCREEN_BUFFER_INFOEX csbi;
 
+    if (USE_WT)
+	return;
+
     csbi.cbSize = sizeof(csbi);
     if (has_csbiex)
 	pGetConsoleScreenBufferInfoEx(g_hConOut, &csbi);