Hi Naomi,
If i use CA (CursorAdapters) and ADODB, then in CA.Init Method, i have some like ():

....
loConnDataSource = createobject('ADODB.Connection')
***<DataSource>
loConnDataSource.ConnectionString = [Provider=SQLOLEDB;Integrated Security=SSPI; 
Initial Catalog=Northwind;Data] + [ Source=(local);]
***</DataSource>

loConnDataSource.Open()
this.DataSource = createobject('ADODB.RecordSet')
...

But, if i use CA, ADODB and 3-Tier model (User Interface, Business Logic and Data Layer), in this case where is there ADODB commands like oConn.Open(),oConn.BeginTrans(), oRS.ActiveConnection = oConn, oRS.UpdateBatch(), oConn.RollbackTrans(), oRS.CancelBatch(), oConn.CommitTrans()... my question: which layer?).

In this case (with ADO commands) is unnecessary CA ?

Please, example.

Thanks,
Best regards
Vojislav