I'm creating a simple form to attach some xml files to outlook express from vfp 9, can you please give me an additional idea how tell vfp to attach the xml files?

You mean you are trying to e-mail xml files as attachments using Outlook Express?

You can do this using MAPI - you cannot automate Outlook Express.

A better idea might be to use CDO for Windows 2000 and later.

Do a search on either MAPI or CDO and you will find lots of information on how to accomplish this.