>Hi Sergey, thanks for answering.
>I'm using Winfax 10.0
>Microsoft fax service can be a good option if it has some conditions:
>
>.- Having SDK or API to use it from VFP
>.- Documentation of this API

See
-http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fax/faxportal_9nol.asp?frame=true
- http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fax/faxlegacy_9lf4.asp?frame=true
- http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fax/faxlegacyvb_4r6t.asp?frame=true

>.- Will works with W2003 too?

I'm not sure. See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fax/faxabout_2zef.asp

>.- Can be used as a printer driver too?

Check http://msdn.microsoft.com/msdnmag/issues/01/08/faxserv/default.aspx