## Presentation Device Driver Reference for OS/2

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### GreEscape DEVESC_FLUSHOUTPUT

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    Syntax
    Parameters
    Returns
    Remarks
    Glossary

Simulation support:

This function is mandatory for hardcopy drivers, but may simply return a DEVESC_NOTIMPLEMENTED code. For other drivers, it is simulated by a handling routine in the graphics engine.

Description:

GreEscape DEVESC_FLUSHOUTPUT flushes any output received for the current document. The handling routine discards all data (such as data stored in a spooler buffer or journal file) received for the current document.

    #define INCL_GRE_DEVICE

    #include <os2.h>

    HDC      hdc;         /*  Device context handle. */

    LONG     lEscape;     /*  DEVESC_FLUSHOUTPUT escape code. */

    LONG     cInCount;    /*  The handling routine ignores this parameter. */

    PBYTE    pInData;     /*  The handling routine ignores this parameter. */

    PLONG    pcOutCount;  /*  The handling routine ignores this parameter. */

    PLONG    pOutData;    /*  The handling routine ignores this parameter. */

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

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

    LONG     rc;          /*  Return Code. */

    rc = GreEscape(hdc, lEscape, cInCount, pInData,

           pcOutCount, pOutData, pInstance, lFunction);