HWEntry - Syntax

Description: 

HWEntry is the single exported function from a graphics adapter device 
driver (GRADD). It is part of the Graphics Hardware Interface (GHI) 
protocol for GRADDs and receives all of the operations from the Video 
Manager (VMAN) component. 

#include <GRADD.h>

GID      gid;         /*  ID of the GRADD. */
ULONG    ulFunction;  /*  Set to appropriate GHI_CMD_ function. */
PVOID    pIn;         /*  Pointer to a GHI_-specific input data structure. */
PVOID    pOut;        /*  Pointer to a GHI_-specific output data structure. */
ULONG    rc;          /*  Return codes. */

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