Simulation support:

This function is mandatory for display drivers. For other drivers, it is simulated by a handling routine in the graphics engine.

Description:

GreEscape DEVESC_QUERYVIOCELLSIZES obtains the details of the VIO cell sizes supported by the presentation driver.

#define INCL_GRE_DEVICE
#include <os2.h>

HDC      hdc;         /*  Device context handle. */
LONG     lEscape;     /*  DEVESC_QUERYVIOCELLSIZES escape code. */
LONG     cInCount;    /*  The handling routine ignores this parameter. */
PBYTE    pInData;     /*  The handling routine ignores this parameter. */
PLONG    pcOutCount;  /*  Pointer to the number of bytes pointed to by pOutData. */
PLONG    pOutData;    /*  Pointer to the address of the data returned. */
PVOID    pInstance;   /*  Pointer to instance data. */
ULONG    lFunction;   /*  High-order WORD=flags; low-order WORD=NGreEscape. */
LONG     rc;          /*  Return Code. */

rc = GreEscape(hdc, lEscape, cInCount, pInData,
       pcOutCount, pOutData, pInstance, lFunction);