Capture Video in C#

I am porting some of our old VB6 code to C# and can only get my solution to
partially work. Using IVideoWindow I am showing the video on screen from a
webcam. We use this video to capture images for a membership system. In our
VB6 version we were able to overlay a selection area which follows the
mouse. This enabled the user to get the correct image size. When the user
clicks on the video window we capture that particular area. I have used
put_MessageDrain to be able to capture the mouse movements and button clicks
but cannot get the bitmap of the selection area to combine with the video
stream. The video always erases the bitmap. Any suggestions would be
appreciated.

Carl


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