Starts an asynchronous, repeated-interval timer.

#define INCL_DOSDATETIME
#include <os2.h>

ULONG      msec;     /*  The time, in milliseconds, that will elapse between postings of the event semaphore specified by hsem. */
HSEM       hsem;     /*  The handle of the event semaphore that is posted each time msec elapses. */
PHTIMER    phtimer;  /*  A pointer to the timer handle. */
APIRET     ulrc;     /*  Return Code. */

ulrc = DosStartTimer(msec, hsem, phtimer);