Delphi 4 and ADO (MS ActiveX )

Someone who knows how to access the Microsoft ADO 2.0 from Delphi 4 ? In VB5
its just to declare variables from the class library
ADODB.

The class is installed and registered through Microsoft Data Access SDK 2.0
and Data Access Components 2.0. from http://www.microsoft.com/data/

I just dont know how to reach the class library from D4 !!! Thx in advance !