>We experience increasing slowdowns in our application as more users use it. The apps and data reside on a server. The network guy wants to throw more bandwidth at the problem - which I'll take - but though it might address the result, it doesn't really address the issue. What can cause decreased performance with increased users?

If you are using views, you could be experiencing locking contention in the DBC. Consider creating a separate DBC for the views and locating them on the workstations. That, or embed the views DBC in your exe. For more info see the 4th bullet under this wiki topic...

http://fox.wikis.com/wc.dll?Wiki~BigSystemPerformanceAndVisualFoxPro~VFP