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Asked: 2026-05-26T12:51:26+00:00

i’ve implemented a owner draw button into my win32 app (no MFC). The button

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i’ve implemented a owner draw button into my win32 app (no MFC). The button is a normal 20×20 bitmap (round icon with transparency). The problem is that the button is positioned on a solid background and i can see the buttons gray background (since the bitmap is round). I’ve tried responding to WM_CTLCOLORBTN with NULL_BRUSH but no luck.. I’ve tried displaying the button using a bitmap and a ico file but wont budge.. Does anyone know how to solve this problem?

This is my problem, the settings icon should be transparent at the edges (not white/gray)

enter image description here

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1 Answer

  1. Editorial Team

    In addition to what @joel’s answer, if you want to make some area transperant put a unique color in the area where you want to have transperancy using some image editors (RGB(0xFF,0x00,0xFF)) is mostly used Then use TransperantBlt

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