ÉäÉXÉg 1.

// CallMeWhen Ç…ÇÊǡǃÉCÉìÉXÉgÅ[ÉãÇ≥ÇÍÇÈîƒópÉRÅ[ÉãÉoÉbÉNä÷êî
// pascal void MyQTCallBackProc(QTCallBack cb, long refCon);

pascal void MyDoSomethingCallBack(QTCallBack cb, long refCon)
{
    MyAppDataPtr myStuff;

    if (NULL == refCon) return;
    myStuff = (MyAppDataPtr)refCon;
    myStuff->didSomething = true;

    return;
}

// callBackAtExtremes ÉtÉâÉOÇΔ triggerAtStop ÉtÉâÉOÇ≈ãNìÆÇ∑ÇÈ
// ÉRÅ[ÉãÉoÉbÉNÇÃÉZÉbÉgÉAÉbÉv
// MyDoSomethingCallBack ä÷êîÇÕÅAäÓèÄéûä‘é≤Ç™í‚é~Ç∑ÇÈÇΔ
// åƒÇ—èoÇ≥ÇÍÇÈ

OSErr SetUpTriggerAtStopCallBack(MyAppDataPtr inAppData)
{
    QTCallBack    theQTCallBack;
    QTCallBackUPP theCallBackUPP;

    OSErr err = paramErr;

    theQTCallBack = NewCallBack(GetMovieTimeBase(inAppData->myMovie),
                                callBackAtExtremes);
    if (theQTCallBack) {
        theCallBackUPP = NewQTCallBackUPP(MyDoSomethingCallBack);
        err = CallMeWhen(theQTCallBack, theCallBackUPP,
                         inAppData, triggerAtStop, 0, 0);
    }

// džÇΔÇ≈ìnÇπÇÈÇÊǧDžDZÇÍÇÁÇï€ë∂
    inAppData->myQTCallBack = theQTCallBack;
    inAppData->myCallBackUPP = theCallBackUPP;

return err;
}