inline __fastcall virtual
      TDBISAMDataSetUpdateObject(System::Classes::TComponent* AOwner)
      : System::Classes::TComponent(AOwner) { } 

Use the New operator to create an instance of a TDBISAMDataSetUpdateObject component using the constructor. However, you should not use this constructor to create an instance of this component directly. Instead you should create an instance of a TDBISAMUpdateSQL component, which descends from this component and provides a published interface for use at design-time.