MDAC 2.5 SDK - ODBC Driver for Oracle
An ODBC application can pass connection information in a number of ways. For example, the application might have the driver always prompt the user for connection information. Or the application might expect a connection string that specifies the data source connection. How you connect to a data source depends on the connection method used by your ODBC application.
One common way to connect to a data source is through the Data Source dialog box. If your ODBC application is set up to use a dialog box, that dialog box is displayed and prompts you for the appropriate data source connection information.
You can also connect to a data source using the connection string.
To connect to a data source using a dialog box
Once the connection information is verified, your application can use the ODBC Driver for Oracle to access the information that the data source contains.