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Do you need to relock surface in system memory?

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I understand the need to lock a surface that is in video memory, but after I lock and unlock a SMEM surface once, can I just keep writing to the *pBits. Thanks, Brian

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Microsoft says not to do that. However, it has been known to work. Your mileage may vary. It''s probably not a good idea, though.

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It''ll explode on some combinations of CPUs and chipsets. Please lock and unlock as you need it, don''t carry the pointer around.

thanks

Development Lead
Windows Graphics & Gaming Technology

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