You dont need to export the database for connecting to VC.
Several ways to connect to VC++
1) ODBC
2) ADO or ADO.NET
3) Oracle "native" SQL interface
1) ODBC is MOST compatible with almost anything. Relatively low performance but your code will be almost 100% compatible with any DB backend.
2) ADO is higher performance (ADO.NET with the .NET framework and VS.NET) and quite portable to other backends as well.
3) "Native" SQL using Oracle developer library is the highest performance way of interfacing to Oracle but your code will be locked into Oracle.
Export Oracle database.
Refer
http://orafaq.com/faqiexp.htm