private void button1_Click(object sender, EventArgs e)        {            Frm f = new Frm();            f.StartPosition = FormStartPosition.Manual;//窗体的位置由 System.Windows.Forms.Control.Location 属性确定            f.Location = new Point(200,200); //开启时的左上角坐标            f.ShowDialog();        }        private void button2_Click(object sender, EventArgs e)        {            this.Location = new Point(300, 410); //移动当前窗口到指定位置        }