In Starcraft to blit a unit Blizzard have two surfaces. One is a unit and the other one is shadow of that unit (which is represent in blue color - dont know why?).
I have done the same thing in my game.
I blt the blue shadow with SRCAND ( to get transparent shadow ) but thing aint working.
For example when unit is on white part of screen the shadow is normaly blue.
I have try other shadow color but it just isnt working.
Any idea what should I do or just know what I am doing wrong plese replay or mail me.