>Al,
>
>You can identify text that resembles a URL with the .NET regular expression parser RegEx. You can find a regular expression that matches URLs at www.regexlib.com. Once you identify the URL, you can enclose it in an href tag and insert the HTML into the .Text of a Label control to render the hyperlink.

Thanks for the RegEx info and the Label technique. That will probably be useful in future. However my users were asking if it could be done for URLs in a read-write TextBox. They're entering research data; at the end of a couple of K of text they're entering references to other research papers, which may include URLs. They were just asking if these could be rendered as hyperlinks within the TextBox.

I don't think it's possible in Read-Write mode, and I don't want to have to manage separate Read-Write and ReadOnly versions of my data entry forms so I'm telling them "no" < g > It's not a big deal for them, anyways.