An application sends a BM_GETIMAGE message to retrieve the handle of the image (icon or bitmap) associated with the button.
BM_GETIMAGE wParam = (WPARAM) fImageType; // image-type flag lParam = 0; // not used, must be zero
IMAGE_BITMAP
IMAGE_ICON
The return value is the handle of the image, if any; otherwise, it is NULL.
file: /Techref/os/win/api/win32/mess/src/msg00_21.htm, 1KB, , updated: 2000/4/7 11:19, local time: 2024/12/4 19:51,
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