How can I add a hyperlink to a RichTextBox control?

To add a hyperlink to the RichTextBox, so that it opens up the link you click on, ensure that DetectUrls property is set to True and call:

[C#]
private void richTextBox1_LinkClicked(object sender, System.Windows.Forms.LinkClickedEventArgs e)
{
    System.Diagnostics.Process.Start(e.LinkText);
}

[VB.NET]
Private  Sub richTextBox1_LinkClicked(ByVal sender As Object, ByVal e As System.Windows.Forms.LinkClickedEventArgs)
    System.Diagnostics.Process.Start(e.LinkText)
End Sub