I have a picture that i want to BitBlt to a formso that the background of the picture is transperent. In the past, i would bitblt a picture with a black background, then bitblt a mask that had the picture replaced with black and the background white. i just got a stack of 200 or so bmps that i want to use in a game, but they are all color pictures with white backgrounds. i thought i would just include a sub in my game to make a mask and a black-background pic from the original pic, but it takes too long. Any ideas on how to improve it so it cane do this with 200 pics in a second or so?
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