C# CreateTimerQueueTimer

[AberAber]

I'm trying to make a periodic timer but this thing seriously just does not work. Maybe I'm getting the wrong signature when I try and use it in C#? It fires the callback immediately (despite it not being supposed to), then gets a memory write exception to 0x00000000.

NewTimer timer = new NewTimer(1000);

	class NewTimer
	{
		DateTime start;
		int ctr = 0;

		[DllImport("kernel32.dll")]
		private unsafe static extern int CreateTimerQueue();

		[DllImport("kernel32.dll")]
		private static unsafe extern bool CreateTimerQueueTimer(ref int* phNewTimer, int TimerQueue,
            WaitOrTimerCallback Callback, object Parameter, long DueTime, long Period, uint Flags);

		private delegate void TimeProc(long param, bool timeOrWaitFired);

		internal unsafe NewTimer(long millis)
		{
			int queueHandler;
			int* pointer = &queueHandler;
			int handle = CreateTimerQueue();
			WaitOrTimerCallback callback = new WaitOrTimerCallback(EventCallback);
            object whatever = 0;
            bool result = CreateTimerQueueTimer(ref pointer, handle, callback, whatever, 10000, 10000, 0);
			start = DateTime.Now;
		}

		public void EventCallback(object param, bool timeOrWaitFired)
		{
			ctr++;
			DateTime now = DateTime.Now;
			TimeSpan diff = now - start;
			Console.WriteLine(ctr / diff.TotalSeconds);
		}
	}