Possibly not quite the answer you're looking for but have you tried using 3rd Party tools?
I use SnagIT (http://www.techsmith.com/snagit.asp) which is especially good for something like you're trying to do and is excellent value for only $40.
Colin Brown
MSN MVP
Hi,
You could try using Wink http://www.debugmode.com/wink/
It records the screen/window to a Flash (.swf) animation, just tried it myself with VE and it worked quite well, it's also FREE ![]()
Cheers
Mike
Theoretically you may be able to do this using the .Net Webclient or using a HTTPRequest and grabbing the image from the stream. Then you could use GDI+ to render the image/add overlays etc..
I haven't tried this, but it may be something I need to do soon anyway ...