Hi, guys here:
Thank you so much for all your kind replies. You are so helpful.
After testing, I still have the question to JpJoe.
If I priorities DAO above ADO, does it mean I'm using DAO. Since I need a multi-user environment, actually I have split my database and have a backend and several frontends, do you think ADO is suitable for me? In that case, I'm wondering if there is potential problems with DAO + ADO in the future?
Right now, I prefer to use ADO + DAO (priority my ADO above DAO), since explicitly declare works well. But I don't know if there is other problems or trouble down the road.
For Loralee, you are right, I'm learning through the sample in that book:)
Both the sample code and the code provided by Dartcoach work well with only DAO reference, and also work well after explictly declare with ADO + DAO.
But as you say, I always want to learn. If convenient, please email yours to me. Thanks a lot!
Again, I really appreciate all the help and your time.