GHI_CMD_QUERYMODES Parameter - pOut

 pOut (PVOID) - output 
    Pointer to the pIn operation. 

    This pointer indicates one of the following, depending on the value of 
    pIn: 

    QUERYMODE_NUM_MODES 
                   Indicates a pointer to a ULONG that is to be given the 
                   number of supported modes. 
    QUERYMODE_MODE_DATA 
                   Indicates a pointer to an array of GDDMODEINFO 
                   structures large enough for the number of supported 
                   modes.