>A client of us wants us to develope an application with SQL Server as back-end. We want to use Visual FoxPro as the Front-end.
>Since they want to have more applications developed in different languages that use the same SQL Server databases they want their business rules to be defined on the SQL Server databases.

Well... you can still use a three tier architexture... but, these tiers would be logical... since the Business Rules are [pysically tied) to the SQL server, if they wanted to scale they would have to increase the SQL machines performance.

So, you will be writting a system with three locical tiers, but two physical tiers.

Have you approached the idea of COM objects with them? Perhaps the don't understand or know this concept.

BOb