David Muir to Mike Bilow (Orig: 21:32, Sun, Feb 18, 1996):

 DM> a  semaphore acceptable to DosStartTimer. Could you supply a
 DM> working example of  the use of DosStartTimer (doesn't have to do
 DM> anything really except accept the  semaphore being passed to it).
 DM> Using DosCreateEventSem, I receive an error 323  (invalid semaphore
 DM> handle).

Cast your HEV semaphore to HSEM when calling DosStartTimer.

#define INCL_DOS
#include 

HEV ESem;
HTIMER Timer;
ULONG AlarmTime, j;
APIRET rc;
USHORT i;

int main(int argc, void *argv[])
{
    AlarmTime = 5000;

    DosCreateEventSem(NULL, &ESem, DC_SEM_SHARED, 0);

    rc = DosStartTimer(AlarmTime, (HSEM)ESem, &Timer);
 >-Typecasting here will fix it---^^^^^^

    if (rc) printf("DosStartTimer failed.  RC = %ld\n", rc);

    j = 0;

    for (i=0; i < 6; i++)
    {
        DosWaitEventSem(ESem, SEM_INDEFINITE_WAIT);
        DosResetEventSem(ESem, &j);
        for (; j > 0; j--)
           DosBeep(1300, 0500);
    }
    DosStopTimer(Timer);
    return 0;
}

GeeCee/2
gchambers{at}maine.com

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