I have a custom Jabber IM client and I\'m having a problem with links. When something like http://something.com is entered I want it to show up as a link in the message win
A RichTextBox can detect URL's, I don't think a regular TextBox can detect them. However you can always use a Single line RichTextBox for your input.
http://msdn.microsoft.com/en-us/library/f591a55w.aspx