VOID
IoStartTimer(
IN PDEVICE_OBJECT DeviceObject
);
IoStartTimer enables the timer associated with a given device object so the driver-supplied IoTimer routine is called once per second.
The DriverEntry routine must have set up the IoTimer routine for the given DeviceObject by calling IoInitializeTimer.
Callers of this routine must be running at IRQL <= DISPATCH_LEVEL.
IoInitializeTimer, IoStopTimer, KeInitializeDpc, KeInitializeTimer, KeSetTimer