Jose', look at XCase (
www.xcase.com). They have a demo version and a shareware version, as well as the full package. It's not as comprehensive as UML, but it's an excellent design and modeling tool, and it will do round-trip engineering (model to VFP and back again).
Bob OHrstedt
bob@rjoassoc.com
Robert J. Ohrstedt
RJO Associates