private const int Pad = 25;
 
private void PaintMessages()
        {
            Point CurrentPoint = panel1.AutoScrollPosition; 
            panel1.SuspendLayout();
            panel1.Controls.Clear();
            CurrentY = 0;
            for (int i = 0; i < Messages.Count; i++)
            {
                int offset = ((panel1.Width - (2 * Pad)) / 3);
 
                ControlTitleBar title = new ControlTitleBar(Messages[i].ID);
                WebBrowser browser = new WebBrowser();
                browser.DocumentText = Messages[i].Content;
                title.isFlagged = Messages[i].isFlagged;
                title.FlagClicked += new btnFlagClickedHandler(title_FlagClicked);
                browser.Width = 2 * offset;
                title.Width = 2 * offset;
                browser.Height = browser.GetPreferredSize(new Size(2 * offset, 0)).Height; //this does NOT work with Webbrowsers...solution needed
 
                Point loc;
                if (Messages[i].Type == MessageType.Received)
                {
                    loc = new Point(Pad, CurrentY + Pad);
                    if (ReplyToId == "")
                        ReplyToId = Messages[i].ExternalID;
                }
                else
                {
                    loc = new Point(Pad + offset, CurrentY + Pad);
                }
 
                title.Location = loc;
                loc.Y += title.Height;
                browser.Location = loc;
                panel1.Controls.Add(browser);
                panel1.Controls.Add(title);
                CurrentY = browser.Location.Y + browser.Height;
            }
            panel1.AutoScrollPosition = new Point(Math.Abs(panel1.AutoScrollPosition.X), Math.Abs(CurrentPoint.Y)); 
            panel1.ResumeLayout();
        }

    private void button1_Click(object sender, EventArgs e)
    {
      int top = 0;
      Point pos = panel1.AutoScrollPosition; //retain the scrolled point
 
      panel1.SuspendLayout();
      panel1.Controls.Clear();
      panel1.AutoScrollPosition = Point.Empty; //clear the scrolled point
      for (int i1 = 0; i1 < 10; i1++)
      {
        TextBox txt = new TextBox();
        txt.Width = this.Width;
        txt.Top = top;
        txt.Text = "btn" + (i1 + 1).ToString();
        panel1.Controls.Add(txt);
        top += txt.Height;
      }
      panel1.ResumeLayout();
      panel1.AutoScrollPosition = new Point(Math.Abs(pos.X), Math.Abs(pos.Y)); //restore it
    }