*** emacs-23.1/src/w32fns.c	Tue Aug 11 07:23:54 2009
--- emacs-23.1/src/w32fns.c.new	Tue Aug 11 07:22:29 2009
***************
*** 3164,3169 ****
--- 3164,3186 ----
  	  TranslateMessage (&windows_msg);
  	  goto dflt;
  	}
+       else
+ 	{
+ 	  extern int w32_get_ime_status (HWND hwnd);
+ 	  MSG ime_undo_test_msg;
+ 
+ 	  if (wParam == VK_BACK
+ 	      && ctrl_modifier == w32_get_key_modifiers (wParam, lParam)
+ 	      && w32_get_ime_status (hwnd) != 0
+ 	      && PeekMessage (&ime_undo_test_msg, hwnd, WM_KEYDOWN, WM_KEYDOWN, PM_NOYIELD | PM_NOREMOVE) != 0
+ 	      && ime_undo_test_msg.wParam == VK_BACK
+ 	      && ime_undo_test_msg.lParam == 0x40000001
+ 	      )
+ 	    {
+ 	      post_character_message (hwnd, msg, wParam, lParam, 0);
+ 	      break;
+ 	    }
+ 	}
  
        /* Fall through */