This call stops a periodic interval timer started by DosTimerStart, or an asynchronous timer started by DosTimerAsync.
DosTimerStop
Handle (HTIMER) - input
DosTimerStop is used to stop an asynchronous one-shot timer started with DosTimerAsync or an asynchronous periodic interval timer started with DosTimerStart.
No assumptions can be made about the state of the semaphore specified with DosTimerStart or DosTimerAsync. The application should put the semaphores into a known state.