Hi,
Thnx Marcel and Jpn for your valuable suggestions.
But the thing is that i want use this capture screen technology on MAC, Linux, and Windows.
So i thought that QT have some support for it but i haven't found anything useful yet.

"Jpn" although grabWindow() can work for me but the whole thing is that how can i know in my QT app that which is active window and how do i get winId of the active window.

And "Marcel" the link you had given me is a useful one i want to use my app across many platforms including MAC, Linux and Windows.



Thnx again for your kind help.