DEVESC_QUERYFB

GreEscape DEVESC_QUERYFB is called by EnDIVE users to get information describing the characteristics of the frame buffer.

Simulation support

None.

Syntax

 GreEscape(hdc, ICODE, lInCount, pbInData, plOutCount, pbOutData);

Parameters

hdc (HDC) - input

Device context handle.

ICODE (LONG) - input

DEVESC_QUERYFB escape code.

lInCount (LONG) - input

Zero (0).

pbInData (PBYTE) - input

NULL.

plOutCount (PLONG) - input

Number of bytes pointed to by pbOutData.

pbOutData (PLONG) - input

Pointer to FBINFO data structure.

Returns

rc (LONG) - returns

Return Codes.

The handling routine returns:

DEV_OK

Successful

DEVESC_NOTIMPLEMENTED

Escape is not implemented for the specified code

DEVESC_ERROR

Error

WINGETLASTERROR can be called for specific error information.

Remarks

None.

Sample Source Code

Declaration:

#define INCL_GRE_DEVICE
#include <os2.h>

HDC       hdc;           /* Device context handle. */
LONG      ICODE;         /* DEVESC_QUERYFB escape code. */
LONG      lInCount;      /* Zero (0). */
PBYTE     pbInData;      /* NULL. */
PLONG     plOutCount;    /* Number of bytes pointed to by pbOutData. */
PLONG     pbOutData;     /* Pointer to FBINFO data structure. */
LONG      rc;            /* Return Codes. */

rc = GreEscape(hdc, ICODE, lInCount, pbInData,
        plOutCount, pbOutData);