>>>We need to put a VFP6 application on WAN and I never did it before.
>>>What is the difference between having VFP application on LAN and WAN??
>>>What do I need to watch for???
>>>Any articles about it???
>> Performance is terrible on a WAN... unless you have specifically designed it with a WAN link in mind. I would suggest investigating MS Terminal Server/Metaframe (thin client).

>Other than performance, everything else should be the same as LAN.
>all I need to worry about is the access to the application server, right?

Only testing will reveal is the link is fast enough for the path you choose and other things that might crop up.

- reasonalby fast : stay with VFP
- medium : perhaps a thin client like MS Terminal sever
- slow : full fledged data server like SQL Server