Claudio,

>I'm hoping to begin to develop a framework, and I really like to do it in a OO way, in a n-tier way. But I have a doubt: we see great VFP authorities, like Stone Field's Doug Henig, using ADO in the third tier. Being VFP a data-centric tool, why use ADO?

It's simple to get the data across the COM boundary with ADO. You can't make a VFP cursor do that without transforming it in some way.