Basically I just wanna know which area of the screen is repainting
particularly that area's coordinates.

Well, I wanna do this because I will be doing a remote desktop,
and for limited bandwidth machines such as those dial-up ones,
I can't be sending the whole screen all the time. It's too slow.
Even if compressed
So, that's why I wanna know which area is repainting and I'll
just send that part to the client.

Thx!