## Presentation Device Driver Reference for OS/2

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### GreSetXformRect

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    Syntax
    Parameters
    Returns
    Glossary

Simulation support:

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

Description

GreSetXformRect intersects a rectangle in device coordinates with the DC region. The rectangle is inclusive at the bottom and left boundaries, exclusive at the top and right boundaries.

This function can be hooked by the presentation driver.

    #define INCL_GRE_CLIP

    #include <os2.h>

    HDC       hdc;        /*  Device context handle. */

    PRECTL    prclRect;   /*  Pointer to a rectangle in device coordinates. */

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

    ULONG     lFunction;  /*  High-order WORD=flags; low-order WORD=NGreSetXformRect. */

    LONG      rc;         /*  Return codes. */

    rc = GreSetXformRect(hdc, prclRect, pInstance,

           lFunction);