## Presentation Device Driver Reference for OS/2

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### GreSelectClipRegion

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    Syntax
    Parameters
    Returns
    Remarks
    Glossary

Simulation support:

This function is simulated by a handling routine in the graphics engine.

Description

GreSelectClipRegion specifies the region to be used for clipping.

This function can be hooked by the presentation driver.

    #define INCL_GRE_CLIP

    #include <os2.h>

    HDC      hdc;        /*  Device context handle. */

    HRGN     hrgn;       /*  Region handle. */

    PHRGN    phrgnOld;

    PVOID    pInstance;  /*  Pointer to instance data. */

    ULONG    lFunction;

    LONG     rc;         /*  Return codes. */

    rc = GreSelectClipRegion(hdc, hrgn, phrgnOld,

           pInstance, lFunction);