无边框窗体的移动方法

        private Point _myPoint;
        //鼠标的按下事件
        private void panel_MouseDown(object sender, MouseEventArgs e)
        ...{
            if (e.Button == MouseButtons.Left)
            ...{
                _myPoint = new Point(-e.X,-e.Y);
            }
        }
        //鼠标的释放事件
        private void panel_MouseMove(object sender, MouseEventArgs e)
        ...{
            if (e.Button == MouseButtons.Left)
            ...{
                this.SetDesktopLocation(this.Left + e.X + this._myPoint.X, this.Top + e.Y + this._myPoint.Y);
            }
        }