>Client has just purchased all new 64bit computer systems running Windows 7. What problems will I encounter if I try to run our Visual Foxpro application in a 64 bit environment. The hardware company says that none of the machines will work when I mentioned that it would have to run this app in 32 bit compatibility mode.

They don't know what they're talking about. Even Office runs in 32 bit mode. If your app. ran OK under Vista it will work under Windows 7.