panel3.AutoScroll = true;
            for (int i = 0; i < 1200; i++)
            {
                Label la = new Label();
                la.Left = 0;
                la.Top = i * 81;
                la.Width = 80;
                la.Height = 80;
                la.Text = i.ToString();
                la.BackColor = Color.Red;

                panel3.Controls.Add(la);
            }