>i'm building the new version of my app. but i want to change forms interfaces by using nice and modern controls (3d buttons,pageframe,combo...)like those used on internet.
>where can find and buy professionnel activex ?

Check http://www.dbi-tech.com/. You can use (almost?) all these controls with VFP. Also check out http://www.codeplex.com/VFPX where you can download some of these controls FREE of charge.