This file is supposed to be installed with VFP but I can't find it anywhere. How can I get the information that I am looking for?

Check out the files section of this forum. You shoould be able to find several MAPI classes that will help you to do what you want.

Alternatovely, you could get a copy of MegaFox: 1002 Things You Wanted to Know About Extending VFP

Chapter 4 is all about sending and reading e-mail.