Picking transparent color from a gif
C / C++ / MFC
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How do you programmatically set transparent color in a gif file? For example I have a gif file "c:\\a.gif", I wish to: Open c:\\a.gif. Set the black color, RGB(0,0,0), as the transparent color. Save the file back to c:\\a.gif. After that when I open c:\\a.gif using photoshop or whatever, the gif displays black as transparent color. Can we do that? Thank you.