C#

private void PaintRectangles(Graphics g)
{
  g.DrawRectangle(...); // Draw rectangles or whatever here
}
protected override void OnPaint(PaintEventArgs e)
{
  base.OnPaint(e);
  PaintRectangles(e.Graphics);
}
private void saveBtn_Click(object sender, EventArgs e)
{
  using (Bitmap bmp = new Bitmap(panel1.Size.Width,
    panel1.Size.Height))
  {
    using (Graphics g = Graphics.FromImage(bmp))
    {
      PaintRectangles(g);
    }
    bmp.Save("filename.png", ImageFormat.Png); // Save as PNG file
  }
}

<br />
// Getting all controls<br />
    Control[] GetAllControls() <br />
    {<br />
      ArrayList list = new ArrayList();<br />
      GetAllControls(Controls, list);<br />
      return (Control[])list.ToArray(typeof(Control));<br />
    }<br />
    void GetAllControls(Control.ControlCollection controls, ArrayList list)<br />
    {<br />
      foreach(Control control in controls) {<br />
        if(control.HasChildren) GetAllControls(control.Controls, list);<br />
        list.Add(control);<br />
      }<br />
    }<br />
<br />
// Calling all your controls and making them call same procedure    <br />
    void Form_Load(object sender, System.EventArgs e)<br />
    {<br />
      foreach (Control c in GetAllControls())<br />
	c.Enter += new EventHandler(c_Enter);<br />
    }<br />
<br />
    void c_Enter(object sender, EventArgs e)<br />
    {<br />
      // Control's select isn't same like TextBox's for example. So I guess you <br />
      // should Check and cast your Controls in this manner... I'll do that for just TextBox<br />
      if (c is TextBox)<br />
        ((TextBox)c).Select(0, c.Text.Length);<br />
        // or ((TextBox)c).SelectAll() for this one could be done;<br />
    }<br />

....................................<br />
richTextBox1.LinkClicked += new LinkClickedEventHandler(Link_Clicked);<br />
................................................<br />
protected void Link_Clicked(object sender, LinkClickedEventArgs e)<br />
{<br />
.................................................<br />
}

int start = richTextBox2.Text.IndexOf(myStartKey) ;<br />
int end = richTextBox2.Text.IndexOf(myEndKey) ;<br />
richTextBox2.SelectionStart = start ;<br />
richTextBox2.SelectionLength = end-start+1 ;<br />
richTextBox1.Text = richTextBox1.SelectedText ;