給groupBox添加滾動條

 public Form3()
        {
            InitializeComponent();
            foreach (Control gbox in groupBox1.Controls)
            {
                if (gbox is VScrollBar) continue;
                gbox.Tag = gbox.Location.Y;
            }
            panelControl1.VerticalScroll.Value = panelControl1.VerticalScroll.Maximum;   
        }

而後加入一個垂直滾動條控件，並添加以下事件：

 private void vScrollBar1_Scroll(object sender, ScrollEventArgs e)
        {
            foreach (Control gbox in groupBox1.Controls)
            {
                if (gbox is VScrollBar) continue;
                gbox.Location = new Point(gbox.Location.X, (int)gbox.Tag - e.NewValue);
            }
        }

注意：給groupbox 的父panel 設置AutoScroll=true