Sorry to evade answering your question but...
Why would you use C++ to import a text file into Access anyway? It is very easy to do this in Access and I can't see any gain from using C++ (Automation?).
Also, Access as a database is very "resource consuming" on the workstation (Assuming its over a network). To me the C++ Access combination is pointless as all of the efficiency gain from C++ is lost when using Access. Try SQL,Betrive or Oracle.
Otherwise I have heard DAO is easy to use.