System.Windows.Forms.Timer.OnTick C# (CSharp) Method

		protected virtual void OnTick (EventArgs e)
		{
			if (Tick != null)
				Tick (this, e);
		}

            protected override void WndProc(ref Message m)
            {
                Debug.Assert(m.HWnd == Handle && Handle != IntPtr.Zero, "Timer getting messages for other windows?");

                // for timer messages, make sure they're ours (it'll be wierd if they aren't)
                // and call the timer event.
                //
                if (m.Msg == NativeMethods.WM_TIMER)
                {
                    //Debug.Assert((int)m.WParam == _timerID, "Why are we getting a timer message that isn't ours?");
                    if (unchecked ((int)(long)m.WParam) == _timerID)
                    {
                        _owner.OnTick(EventArgs.Empty);
                        return;
                    }
                }
                else if (m.Msg == NativeMethods.WM_CLOSE)
                {
                    // this is a posted method from another thread that tells us we need
                    // to kill the timer.  The handle may already be gone, so we specify it here.
                    //
                    StopTimer(true, m.HWnd);
                    return;
                }
                base.WndProc(ref m);
            }