GHI_CMD_VRAM Parameter - pOut

 pOut (PVOID) - output 
    Pointer to a function-specific output data structure. 

    If the ulFunction field of the VRAMIN structure pointed to by pIn is 
    set to VRAM_ALLOCATE, VRAM_DEALLOCATE, or VRAM_QUERY, then pOut points 
    to a VRAMALLOCOUT data structure. 

    If the ulFunction field of the VRAMIN structure pointed to by pIn is 
    set to VRAM_REGISTER or VRAM_DEREGISTER, then pOut points to a 
    VRAMREGISTEROUT data structure.