Use GdiGradientFill (not GradientFill) to implement gradient caption bar (for now).
GradientFill is pretty slow, as it files the rectangle line by line. I'm not sure how much this is going to slow down a normal application. It used to draw pixel by pixel, and that was a very noticable slowdown... line by line is much faster than that, but it still may cause a slowdown in some circumstances.
Anybody have any ideas about how to speed up GradientFill?
Mike
