Windows自帶的邊框很影響我們個性化定製視窗UI的美觀程式。
首選選擇視窗，屬性裡的FormBorderStyle設定為None。
邊框去掉之後 會發現視窗無法最大最小化和移動。
1 在標題欄處新建三個panel，分別為標題欄，最大最小化按鈕和關閉按鈕

將後面幾個panel設定BackgroundImage為相應圖示
分別為panel_title panel_min panel_close
為panel_title新增MouseDown和MouseMove事件程式碼為

private Point mousePoint = new Point();
private
 
 void panel_title_MouseDown(object sender, MouseEventArgs e)
        {
            base.OnMouseDown(e);
            this.mousePoint.X = e.X;
            this.mousePoint.Y = e.Y;
        }

private void panel_title_MouseMove(object sender, MouseEventArgs e)
        {
            base.OnMouseMove(e);
            if (e.Button
 
 == MouseButtons.Left)
            {
                this.Top = Control.MousePosition.Y - mousePoint.Y;
                this.Left = Control.MousePosition.X - mousePoint.X;
            }
        }

為panel_min新增click事件

 this.WindowState = FormWindowState.Minimized;

為panel_close新增close事件

private
 
 void panel4_Click(object sender, EventArgs e)
        {
            DialogResult result = MessageBox.Show("是否退出？", "操作提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (result == DialogResult.Yes)
            {
                //this.Dispose();
                Application.Exit();
            }
        }

這樣，視窗就可以拖動移動了