>How's re-use code issue in Foundation Read vs READ EVENT? If I use foundation read in this project (huge one) in VFP, will future maintainence easier than READ EVENT? Does Foundation Read able to mix with OOP? And will it be difficult to convert to real OOP in the future?

There is no reuse when moving from non OOP to OOP interface. At least, no one will suggest you that. If you want to benefit of OOP, which is one of the main reason to move to Visual FoxPro, then you need to rewrite.

>Do you have any sample programs, codes, reference (book) or journals that demostrate READ EVENT is better than Foundation Read?

Yes, all the messages in the Universal Thread where people suggested to use READ EVENTS. :)