>I place this message in the Internet section, altough it's not directly related to the Internet.
>It's more about modem communications.
>
>The problem is as follows.
>
>PC1 and PC2 are separated by 800 km.
>
>PC1 validates a form and attempts to send the data to PC2.
>If PC2 is busy, try antoher 4 times
>IF data transfer succeeded, PC2 sends an acknoldgement to PC1.
>
>On PC2 side, PC2 is always listening. If there's a call, modem attends the call,
>receives the data, sends an acknowledgment and disconnects.
>
>I am being asked if I could do that in VFP, and hell, I don't have a clear idea where to start from...
>

Only part of the problem is handled by VFP; the remainder is a WAN connection issue.

There are a ton of ways to approach this; I'd tend to use RAS to make the remote connection. Essentially, you want to make a network connection via dialup to the remote system. Using RAS makes the connection easy.

RAS has the additional advantage of leveraging the operating system's WAN capabilities. IOW, it doen't matter if it's a dial-up, a dedicated line, or a VPN through the Internet to a machine that has a static IP address. A connection is a connection.

Once the connection is established, there are lots of options - using a Web server that invokes a VFP app and sends back a reply, or DCOM and a Remote Automation Server.

There are lots of approaches available here. If you wanted to use a connectionless service, consider email - you could do this project with Outlook and VFP in collaboration.

>José