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Writing a Timer Callback Function

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The following callback function, OneShotTimer, invalidates the identifier for the single timer event and calls a timer routine to handle the application-specific tasks. For more information, see TimeProc.

void CALLBACK OneShotTimer(UINT wTimerID, UINT msg, 
    DWORD dwUser, DWORD dw1, DWORD dw2) 
{ 
    NPSEQ npSeq;             // pointer to sequencer data 
    npSeq = (NPSEQ)dwUser;
    npSeq->wTimerID = 0;     // invalidate timer ID (no longer in use)
    TimerRoutine(npSeq);     // handle tasks 
}