>That is a opportunity to developers to show their application (simple but cool) at one of the Teched booth in my country. I think we can use this golden chance to "promote" VFP. Of course, .NET is the "main" topic. So, do you have any ideas on develop a simple program that using VFP & .NET?
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>I will ask permission from the booth owner to have VFP & .NET application. Hope they allow.

A good resource on this is at http://gotdotnet.com/team/vfp called Using ASP.NET in Visual Studio .NET with Visual FoxPro. There is a link to a whitepaper on this topic there as well as sample code in the article as well as downloads you can use to do demos.