## Graphics Adapter Device Driver Reference

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### VHLockMem - Parameters

pAddress (PVOID) - input Address within the first page of code or data.

ulLength (ULONG) - input Size of code or data segment.

fData (BOOL) - input FALSE indicates code segment; TRUE indicates data segment.

rc (ULONG) - returns Return value.

Non-zero lockhandle indicates success; zero indicates error.