See below, but I suspect that if you have Windows 2000 or XP and Word 2000
or later, then using the macro is likely to be easier and more reliable
(once you have got it working) than any other approach.

Every fax that you send via a local faxmodem on Windows 2000 and later goes
via Windows' fax subsystem, one way or another, as far as I know. The macro
just uses the standard software interface to the fax subsystem. It doesn't
use anything that is not on a standard Windows XP system or a Windows 2000
system with the standard fax software installed.

All that does is to set Word up so that it sends faxes via Outlook messages.
To make that work at all
a. the necessary Outlook fax service software has to be set up
b. your data source must contain a field that has the fax number in the
format that Outlook expects

Even then, you may find that Outlook does not format the fax in the way that
you expect.

I'm not surprised because as far as I know, Microsoft has provided at least
4 different ways of faxing from Windows/Office since Windows 95, and none of
the recent versions provides a reliable, easy-to-use method to merge to fax.

You can certainly try. See, e.g.

http://support.microsoft.com/kb/294695/

Peter Jamieson