The drivers for Windows should be at the ODBC 3.0 level or higher. ODBC.INI is a subkey of the HKEY_CURRENT_USER\\SOFTWARE\\ODBC key in the Windows registry. The ODBC.INI subkey is maintained by the ODBC Administrator, which is located in the main PL/I program group. Since Windows can support multiple users, the ODBC.INI subkey is stored under unique user keys in the registry.