>Can somebody tell me if there is any advantage to migrate from vfp9 to delphi. I don´t know nothing about delphi, a customer said me that it is more powerfull and efficient than vfp9.

VFP is more stable by far.

I worked with a fairly major Delphi/Oracle project last year. Delphi wants to do a lot of cool things (it tries to be a .NET). If it was stable, some of it could be worthwhile. It wasn't stable (run time or design time). I'm very happy to not be working with it now.