Use ParameterObject to gain direct access to the ADO Parameter object that corresponds to the TParameter object. Using this reference, you can access properties and call methods of the ADO Parameter object. 

Under ordinary circumstances it should not be necessary to use the ADO Parameter directly in an application. This property is provided for the instances where a property or method of the ADO Parameter is needed but not implemented in the TParameter object. You should be familiar with ADO objects before attempting to use them directly. Consult the Microsoft Data Access SDK for more specific information on ADO objects and their properties and methods.