VHMapVRAM - Parameters

 ulPhysAddr (ULONG) - input 
    Physical address of the start of the VRAM aperture. 
 

 ulLength (ULONG) - input 
    Length of VRAM aperture. 
 

 pVRAM (PBYTE *) - output 
    Returned process virtual linear aperture pointer. 
 

 pVRAMRing0 (PBYTE *) - output 
    Returned ring 0 virtual linear aperture pointer. 
 

 rc (ULONG) - returns 
    Return value. 

    RC_SUCCESS or RC_ERROR.