/// <summary>
 /// 窗体Panel鼠标弹起事件
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void index_top_MouseUp(object sender, MouseEventArgs e)
 {
     Index_movetimer.Stop();                                       //停止计时器
 }
        private Point mpoint = new Point();                                //鼠标坐标

        /// <summary>
        /// 窗体Panel鼠标按下事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void index_top_MouseDown(object sender, MouseEventArgs e)
        {
            mpoint.X = e.X;                                                //获取鼠标在窗体中的位置
            mpoint.Y = e.Y;
            Index_movetimer.Start();                                       //启动计时器
        }