>>It definitely supports N-tier development with business objects.

This does not necessarily mean that Kevin's framework supports N-Tier development. Actually, the N can be anything right??? 1,2, 3+. As I recall, the original CodeBook framework tied the bizobj's with the UI. I have not seen Kevin's framework for quite sometime. For multi-tier development to be supported, the framework needs to support COM and the biz objects need the ability to exist independently from the UI/Presentation layer. The only framework I know of that does this is Visual FoxExpress 6.0 from F1 Technologies.