WinFrom中实现点击关闭按钮窗口在靠屏幕左边中间缓缓收缩

        private void btn_close_Click(object sender, EventArgs e)
        {
            timer_close.Start();
        }
        int _X = 0;
        int _Y = 0;
        private void timer_close_Tick(object sender, EventArgs e)
        {
            //渐渐的关闭
            _X = this.Location.X;
            _Y = this.Location.Y;
            _X -= 5;
            this.Location = new Point(_X, _Y);
            if (_X <= -900)
            {
                this.timer_close.Enabled = false;
                this.Close();
            }
        }

Timer 空间的Interval数值是走动的速度