Grabbing screen shots (but not to file)

[farshizzo]

I just finished implementing the plugin for 3.0. Here are some notes about the plugin:

- It grabs the screen buffer directly from windows, not OpenGL. The benefit is that it can capture a little faster and it can run in a separate thread.

- The image is in raw BGR format.

- The image is inverted vertically because in Windows the origin of an image is the top left corner.

I've attached a zip file which contains the plugin and an example file. Again, this will only work with Vizard 3.0