James Crowley has mentioned :
Toolbar1.Buttons("Underline").Selected = Abs(RichTextBox1.SelUnderline)
With the release of Visual Studio .NET, this topic is no longer being updated.
SelBold, SelItalic, SelStrikethru, SelUnderline Properties.
So if u try to use it will give u error saying , not a memeber of richtextbox.
Pls wait till its updated.....
Arvind