private void button1_Click(object sender, EventArgs e)
 {
     addLog("START LargeIntervaleTimer");
     myDict.Clear(); myDict2.Clear();
     timer = new OpenNETCF.WindowsCE.LargeIntervalTimer();
     listUserNotifications(true);
     timer.Interval = new TimeSpan(1, 0, 0);
     timer.Tick += new EventHandler(timer_Tick);
     timer.Enabled = true;
     listUserNotifications(false);
 }
 private void btnStop_Click(object sender, EventArgs e)
 {
     addLog("STOP LargeIntervaleTimer");
     if (timer != null)
     {
         timer.Tick -= timer_Tick;
         timer.Dispose();
         timer = null;                
     }
     myDict2.Clear();
     listUserNotifications(false);
 }