Robert,

>Can anybody tell me how to send a file to another modem?
>I think this can only be done using mscomm. But I don't know how to use it.
>It is possible to initialize the modem but I can't force it to dial the number.

In addition to Ed's comments You can also use the WinSock Control. There is an
article in the MSKB#Q315124 that tells You how to use it with VFP.

Also You could start doing these things over HTTP or ftp via WebServices
or using Rick Strahl's WebConnection.

Nowadays that we have (analog) modems, ISDN, DSL, leased lines, etc. I would,
if possible, separate the process of creating the connection from the actual
data-transfer. For the data transfer I would use a standard-protocol like TCP/IP.

If You do that, it will not matter if You connect to the "server" via a local network,
the internet or a DUN-connection per modem or ISDN. The "Server" does not necessarily
have to be a true standalone Server. NT4, Win2K and XP even as workstation can run a
WebServer in the background. That provides the necessary functionality. And you can
install Private Webserver (don't know the actual name at the moment) on Win98.
All these systems allow to run as RAS-Server allowing DUN-Access with security-
mechanisms as callback and authentification.

WebServer in this context does not mean colorful html-pages, but gives You the
ability exchange data via WebServices or other COM-objects. (-> ASP).

And the best is: You already own all of this stuff. There's nothing You'll have
to buy. It will make things easier if You use third party tools but You don't necessarily
have to.