ImageList_AddMasked


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ImageList_AddMasked
int ImageList_AddMasked(
    HIMAGELIST himl,
    HBITMAP hbmImage,
    COLORREF crMask
   );	
Adds an image or images to an image list, generating a mask from the specified bitmap.
Returns the index of the first new image if successful, or -1 otherwise.

himl
Handle to the image list.
hbmImage
Handle to the bitmap that contains one or more images. The number of images is inferred from the width of the bitmap.
crMask
Color used to generate the mask. Each pixel of this color in the specified bitmap is changed to black, and the corresponding bit in the mask is set to 1.

The ImageList_AddMasked function copies the bitmap to an internal data structure. Be sure to use the DeleteObject function to delete hbmImage and crMask after the function returns.

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