Button Ownerdraw - Transparency Issue

May 18, 2013, 11:23 pm

≪ Previous: If I take too many screenshots the pics get black

- I've created a CPngButton from CBitmapButton.
- It overrides DrawItem() and draws the given PNG image using GDI+.
- The wm_erasebkgnd and wm_ctlcolor is taken care.
- while displaing the CMainFrame its displaying properly.
- Later if we resize the window couple of times, the transparent portions of button becomes black.
- OS is Windows 7 with Aero enabled.

- It looks like...

- Any idea what I'm missing here?

(Some more information: The buttons are hosted on a CWnd as container. This CWnd is placed over left of menubar to looks like a quick access toolbar, which is a requirement).

Best Regards,
Jijo.

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