Having completed all the previous steps, you can now create an ODBC Datasource for your database.
This is done from either:
In all cases you will be shown the Oracle ODBC Driver Configuration dialog.
You only need to specify 2 things:
If there are no entries in the dropdown list it means that the Oracle Client could not find your tnsnames.ora file. The most likely cause is that the TNS_ADMIN environment variable has not been set correctly.
You may get a crash such as System Error code 14001. If this happens, the cause if that you have not installed the Visual Studio Redistributable.