急，关于线程的问题

Question

        private Timer time = null;
        public Form1()
        {
            InitializeComponent();
            time = new Timer();
            time.Enabled = false;
            time.Interval = 100;
            time.Tick += new EventHandler(time_Tick);
        }        void time_Tick(object sender, EventArgs e)
        {
            //throw new Exception("The method or operation is not implemented.");
            this.label1.Top -= 1;
            if (this.label1.Bottom <= 0) 
            {
                this.label1.Top = this.panel1.Bottom;
            }
        }        /// <summary>
        /// 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            this.time.Start();
        }

Answer 1

上面是一个label放在panel上实现的，用timer改变label的top来实现向上滚动效果