public Form controlBox;
        public delegate void delegateM(int i);
        delegateM dm;
        System.Timers.Timer timer;

        controlBox = new Form();
        timer = new System.Timers.Timer();
        timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
        timer.AutoReset = true;
        timer.Interval = 50;
        timer.Enabled = true;

        void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            dm = Move;
            try
            {
                controlBox.Invoke(dm, new object[] { top });//跨线程移动窗体，引发了多个异常
                  timer.Enabled = true;
            }
            catch { }
        }

        void Move(int top)
        {
            controlBox.Top = top;
        }

         timer.Stop();
         timer.Close();