How to draw only within the area of a shaped custom control?

[Ziv]

Hello!

I have an owner-drawn (derived from CButton) control in my dialog box. In it's PreSubclassWindow function, I set it a new region (elliptic region) using SetWindowRgn. And here's the problem: although the control looks elliptic in the dialog box (I checked it with Spy++), when I do a simple draw like this:

dc.FillSolidRect(&myRect, RGB(0, 0, 0));
(from within "CSpecialButton::OnPaint" or something alike)

the entire rectangle gets painted in black; not only the elliptic shape!! The same happens with other draw functions.

If you have any idea what might be wrong, please post me a response or E-Mail: [email protected]

Thanx! Ziv

[Gomez Addams]

Have you tried CDC::FillRgn ?
Its arguments are a CRgn pointer and CBrush pointer.

Another possibility is to call SelectClipRgn.