MDAC 2.5 SDK - ODBC Programmer's Reference
Appendix G: Driver Guidelines for Backward Compatibility
When an ODBC 2.x application calls SQLInstallTranslator through an ODBC 3.x driver, the Driver Manager maps the call to SQLInstallTranslatorEx. An application should not call SQLInstallTranslator in the ODBC 3.x Driver Manager with the lpszInfFile argument set to a value other than NULL. The ODBC.INF file used in ODBC 2.x is no longer supported in ODBC 3.x, even for backward compatibility.