Computer vision

Are there any decent libraries / classes that enable video capture (frame at a time) from something like a twain compatible USB webcam?

Should be easily integrated into a .net app (I'll be using VB mostly).

I have just procured a "Trust 120 SpaceC@m" (el cheapo model) and want to try my hand at computer vision experiments.

Any ideas? Any robotics enthusiasts out there?

Its not exactly what you are looking for, but it might be similar to what you are looking for. This shows how you can Interface with Scanner using TWAIN API. Hope it helps.

http://www.codeproject.com/dotnet/twaindotnet.asp