get an image representation of active windows in cocoa

Question

how can i get in cocoa a smaller image version of the active windows.

just like exposé but i only need a windows.

in exposé you see the running version if it is a movie.

thank you

Answer 1

http://www.noodlesoft.com/blog/2007/09/20/animation-in-the-time-of-tiger-part-3/