How can I get access to a video card frame buffer in a WPF app?

I'm trying to write a (very minimal) WPF app which will look at a video card frame buffer and do some image analysis on the data.

I'm a complete noob when it comes to this kind of stuff, and I've tried going d开发者_StackOverflow社区own a couple roads before posting, but I'm completely lost on what will actually get me what I want.

This is going to be used to grab frames while playing a full screen video game (starcraft 2), but it should be able to grab frames for the duration of the app (when simply looking at the Windows desktop...).

Thanks, Mark

I haven't tested it, but after some googling I found this think. I don't know if it works with Directx / OpenGL, but it's worth trying.