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;

        }

 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);

            }

        }