msec (ULONG) - input

The time, in milliseconds, before the event semaphore specified by hsem is posted.

(The system rounds this value up to the next clock tick.)

hsem (HSEM) - input

The handle of an event semaphore that will be posted when the time specified by msec has elapsed.

This semaphore must be a shared event semaphore, and should be reset before issuing DosAsyncTimer.

phtimer (PHTIMER) - output

A pointer to the timer handle.

This handle can be passed to DosStopTimer to stop the timer before its time interval expires.

ulrc (APIRET) - returns

Return Code.

DosAsyncTimer returns one of the following values:

• NO_ERROR 323
  ERROR_TS_SEMHANDLE
  324
  ERROR_TS_NOTIMER
  For a full list of error codes, see Errors.