As I understand the given (Borland) architecture you will have your own components (TMohfaDataSet e.a.) in a
Unit named MOHFADB - to distinguish it from ADODB and others. Your TMohfaDataset should be derived from TCustomMohfaDataSet which in turn should inherit directly from TDataSet. Your task is to implement the abstract methods from TDataSet in your own class TCustomMohfaDataset and to publish a compatible (see TADODataset) set of properties in your class TMohfaDataset. Please make good use of the sources that came with your Delphi Enterprise Edition and make sure you read the relevant chapters in the documentation.
Regards