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
Parameters
fImageType
Value of wParam. Specifies the type of image to associate with the button. This parameter can be one of the following values:
IMAGE_BITMAP
IMAGE_ICON
Return Values
The return value is the handle of the image, if any; otherwise, it is NULL.
See Also