Patrice,
I can try to help you with some code, but I need to ask a few questions:
1) Are you using VS2003 or VS2005?
2) Are the tables mittellog, estimators and reviewerids going to stay as FoxPro tables, or are they SQL Server tables? (Maybe a more general question is whether you're trying to use VB.NET to access a Fox back end or a SQL back end)
Let me know....thanks,
Kevin