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need help with locking dd surf

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When I lock a dd surface, how can I get to pixel (x,y)?? Let''s say that I lock rectangle rc, and in ddsd I have the surface description. What''s the formula to get to the memory for pixel (x,y), relative to the upper-left corner of rc. The bpp is 16bits. I tried: *(WORD*)((BYTE*)ddsd.lpSurface+y*ddsd.lPitch+x*2) but i get something weird. Please help me, someone. Octavian E-mail: Webpage:

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