>I would like to know what's the percent of foxpro developers around the world against developers using other programming tools as visual basic, oracle, power builder and so on.

About 500 000+ strong. % ???

>Is there some danger of visual foxpro being replaced by other tool? what are the advantages/disadvantages of Visual Basic or Power builder wich are getting more popular every day?

The goal for Microsoft is to make us "Microsoft programmer's" not vfp or vb ... programmers. That's why Visual Studio exist so to make this step more easier.

Steve