static extern uint timeSetEvent(uint uDelay, uint uResolution, TimerCallback lpTimeProc, UIntPtr dwUser, uint fuEvent);

    delegate void TimerCallback(uint uTimerID, uint uMsg, UIntPtr dwUser, UIntPtr dw1, UIntPtr dw2);

    TimerCallback thisCB;

            preventSleepTimer = new System.Threading.Timer(new TimerCallback(PokeDeviceToKeepAwake),

enum TimerCallback { Function = 0, EventSet = 0x10, EventPulse = 0x20,

Enum TimerCallback