I sympathise with you and Etsherman in feeling that your users *shouldn't* want you to send it by fax. Unfortunately, I've never had much luck with that approach :-)
You might check out this thread with sample code for using VBA to send attachments via RightFax. It assumes you have necessary credentials to access your inhouse RightFax server, and that you have installed the RightFax API object libraries. Both of those should be available from the administrator of your inhouse RightFax system. The library files should also be available from Captaris (the RightFax publisher).
http://www.utteraccess.com/forums/showflat.php?Cat=&Number=1416618&Main=1416512You'll need to adapt it to your own internal configuration, of couse.