/// <summary>
        /// 鼠标抬起事件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnMouseUp(MouseEventArgs e)
        {
            base.OnMouseUp(e);
            Point mouseLocation = this.PointToClient(Cursor.Position);
            if (this.ClientRectangle.Contains(mouseLocation))
            {
                //鼠标在控件区域上
            }
        }