## Presentation Device Driver Reference for OS/2

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### GreCloseScreenChangeArea

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    Syntax
    Parameters
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    Remarks
    Glossary

Simulation support:

This function is mandatory for display drivers that want to be DCAF-enabled .

Description GreCloseScreenChangeArea frees the data area internal to the display driver, identified by the SCA handle, that was accumulating screen changes.

    #define INCL_GRE_SCREEN

    #include <os2.h>

    #include <pmddi.h>

    HDC      hdc;     /*  Any valid device context. */

    HSCA     hsca;    /*  Handle of the SCA to be closed. */

    PDC      pdcArg;  /*  Pointer to instance data. */

    ULONG    FunN;    /*  High-order word=Flags; Low-order word=NGreCloseScreenChangeArea. */

    BOOL     rc;

    rc = GreCloseScreenChangeArea(hdc, hsca, pdcArg,

           FunN);