## Presentation Device Driver Reference for OS/2

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### VisRegionNotify

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    Syntax
    Parameters
    Returns
    Remarks
    Glossary

Description:

VisRegionNotify recalculates the visible region and validates the DC region .

    #include <os2.h>

    ULONG    hdc;       /*  Device context handle. */

    BOOL     fSuccess;  /*  Return codes. */

    fSuccess = VisRegionNotify(hdc);