Get pixel color of a screen

Hi guys how i can get pixels color on a part of the screen?(in windows)
maybe using win32? i am looking for in google and i dont find anything
:confused:
thanks

I have used win32/screenshot in the past.

http://rubygems.org/gems/win32screenshot

– Matma R.

2012/5/10 Ivan Vilches B. [email protected]: