URL Access in Messages
The History Preview and Incoming Messages windows use a "RichEdit" window so URLs are live (meaning that you can click a hyperlinked Web page address and it will open in your browser).
This is also true of the Read Message window, when you are reading a message someone sent you. To reference a file on your local network that you want someone to be able to open with a single click, add "file://" in front of it, as in:
file://F:\Abacus\Readme.doc