To get access to the record definitions for the structures use:
This operation resets the position to the first property name.
This operation returns true if a Property Name exists at the current position and the out parameter is a valid Property Name. If false is returned the out parameter is a non-valid Property Name.
This operation returns true if the requested number of Property Names can be delivered and there are additional property names. If false is returned a sequence of max HowMany property names will be returned and no more Property Names can be delivered.
This operation will terminate the Iterator and all subsequent calls will fail.