CMFCToolBarImages::CreateRegionFromImage
This topic is included for completeness. For more detail see the source code located in the VC\atlmfc\src\mfc folder of your Visual Studio installation.
static HRGN __stdcall CreateRegionFromImage(
HBITMAP bmp,
COLORREF clrTransparent
);
Parameters
[in] bmp
[in] clrTransparent
Requirements
Header: afxtoolbarimages.h