Copying here my answer at: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/11a42336-8d87-4656-91a3-275413d3cc19 What seems to work for me is the following (copying from the source code of http://ClipFlair.codeplex.com [currently under development]) note I’m using Build Action = "Page" and Custom ...

I came across a useful Microsoft Support sample called “How to wait for a shelled application to finish by using Visual Basic 2005 or Visual Basic .NET” at http://support.microsoft.com/kb/305368 However, note that there are several gotchas with the code supplied there (just informed Microsoft on that, hope they take notice). Also the article ...