[Resolved] Easy BitBlt Problem

Does anyone know why this wont work for me?:

VB Code:

BitBlt Picture1.hDC, 480 * (b - 1), 480 * a, 480, 480, _
    Picture3.hDC, 0, 0, SRCCOPY

Nevermind, I figured it out.

But can anyone tell me where I can find some good information on transparent blitting?

Nevermind again. Found it in the API Guide.