GHI_CMD_PALETTE - Syntax

Description: 

GHI_CMD_PALETTE is mandatory if the device supports 256-color modes. This 
function is called to set or query the hardware palette. The GRADD is 
expected to respond by describing the palette in a given array or by using 
the palette given in the array. The GRADD is always given an HWPALETTEINFO 
structure with either the PALETTE_GET or PALETTE_SET flag to specify the 
operation to perform. 

#include <GRADD.h>

GID      gid;         /*  ID of the GRADD. */
ULONG    ulFunction;  /*  Set equal to GHI_CMD_PALETTE. */
PVOID    pIn;         /*  Pointer to an HWPALETTEINFO structure. */
PVOID    pOut;        /*  NULL; no output structure is needed. */
ULONG    rc;          /*  Return codes. */

rc = HWENTRY(gid, ulFunction, pIn, pOut);