## Presentation Device Driver Reference for OS/2

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### GreSaveScreenBits

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    Syntax
    Parameters
    Returns
    Remarks
    Glossary

Simulation support:

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

Description:

GreSaveScreenBits saves a rectangle of screen bits.

    #define INCL_GRE_BITMAPS

    #include <os2.h>

    HDC       hdc;        /*  The device context handle. */

    PRECTL    prclRect;   /*  A pointer to a screen rectangle defined in screen coordinates. */

    PVOID     pInstance;  /*  A pointer to instance data. */

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

    ULONG     rc;         /*  Return codes. */

    rc = GreSaveScreenBits(hdc, prclRect, pInstance,

           lFunction);