Use the ConnectionObject property of TADOConnection to access the underlying ADO connection object. Using this reference it is possible to access properties and call methods of the underlying ADO Connection object. 

Using the underlying ADO Connection object requires a good working knowledge of ADO objects in general and the ADO Connection object in particular. It is not recommended that you use the Connection object unless you are familiar with Connection object operations. Consult the Microsoft Data Access SDK help for specific information on using ADO Connection objects.