MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Microsoft Data Access SDK > Microsoft Open Database Connectivity (ODBC) > ODBC Programmer's Reference > Part 2 Developing Applications and Drivers > Chapter 17 Programming Considerations > Driver-Specific Data Types, Descriptor Types, Information Types, Diagnostic Types, and Attributes > Duplicated Features > Writing ODBC 3.x Applications