I am creating a Diff Window, like described there: http://social.msdn.microsoft.com/Forums/en-US/vsx/thread/af777e42-f8ed-4cdd-b22c-3c30bf450f8b
But when I pass to the method a path to non-existing file, then the OpenComparisonWindow2 throws an exception. If I do the same from Source Control Explorer, then it will be shown, as in the picture below. How can I get the same result?