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Transparent Surface Copying

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Basically my question is, does D3DXLoadSurfaceFromSurface LIE that it can make one color transparent? if i want color(255,0,255) to be transparent, making the alpha channel 0 gives me the color, and making the alpha channel 255 makes the color black, not transparent. If i want a transparent surface, do i have to make like Walsh and create my own surface copy, complete without any hardware acceleration? SURELY MS recognized this as a problem after it first released DirectX 8, so why havent they fixed it?

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