>My application is built with DBFs
>
>I want to upsize it to SQL Server ... and be able to have the DBF version still working.
>
>I don't know anything about cursor adapters. Would the use of cursor adapters make what I want to do possible?
>
>Would I be able to make an application that would work either with DBFs or Client-server architecture?

Basically, you should just replace every USE with SELECT-SQL, obviously it may change application design if you work with big tables. It means that it should be done on design level while cursoradapter could be nice but it's not a necessity.