GreQueryBitmapHandle

GreQueryBitmapHandle gets the bit-map handle for the specified local identifier (lcid). When lLcid does not reference a bit map, an error is raised by the graphics engine.

This function is supported by the graphics engine.

Syntax

GreQueryBitmapHandle(hdc, lLcid, pInstance, lFunction)

Parameters

hdc (HDC) - input

Device context handle.

lLcid (LONG) - input

Local identifier for which the bit-map handle is required.

pInstance (PVOID) - input

Pointer to instance data.

lFunction (ULONG) - input

High-order WORD=flags; low-order WORD=NGreQueryBitmapHandle.

Return Code

rc (HBITMAP) - returns

Return codes.

This function returns the bit-map handle (hbm), or it returns GPI_ERROR if an error occurs.

Possible Errors Detected: When an error is detected, the graphics engine calls WinSetErrorInfo to post the condition. Reasons for failure of this function include:

• PMERR_BITMAP_NOT_SELECTED
• PMERR_HDC_BUSY
• PMERR_INV_HDC
• PMERR_INV_SETID

Refer to the "Error Explanations" section of the Presentation Manager Programming Reference for further explanation.

Sample Code

#define INCL_GRE_LCID
#include <os2.h>

HDC        hdc;        /*  Device context handle. */
LONG       lLcid;      /*  Local identifier for which the bit-map handle is required. */
PVOID      pInstance;  /*  Pointer to instance data. */
ULONG      lFunction;  /*  High-order WORD=flags; low-order WORD=NGreQueryBitmapHandle. */
HBITMAP    rc;         /*  Return codes. */

rc = GreQueryBitmapHandle(hdc, lLcid, pInstance, lFunction);