UnitWizU.Pas - generic complib based expert,
               works in all versions

UnitWizU2.Pas - generic complib based expert,
                with extra code to show 32-bit add-in expert

DLLWiz.Dpr, DllWizU.Pas - generic DLL-based expert,
                          works in all versions

DLLWiz2.Dpr, DllWizU2.Pas - generic DLL-based expert,
                            with extra code to show 32-bit add-in expert

For more information on experts, see the following references:

The Revolutionary Guide To Delphi 2, 
  Various Authors, Wrox Press
  Chapter 13

Secrets Of Delphi 2, 
  Ray Lischner, Waite Group
  Chapter 23

Hidden Paths Of Delphi 3: Experts, Wizards And The Open Tools API,
  Ray Lischner, Informant Press
  Erm, the whole book

Delphi Developer's Handbook
  Marco Cantu, Sybex
  Chapter 14