Claudio,
>I´m testing some performance issues with VB against VFP, and the results are scaring me. I´d like to ask for some help with a VB developer skills, to do the same tests...
I cannot help you with your tests, but I can point you to a useful resource. Beth Massi of GoAmerica did a series of VB and VFP performance tests and has posted the results and methods used to test on her website:
http://members.home.net/bmassi/