Foros Club Delphi - ¿Como usar este código?

Encontré este código, pero no me dice que USES debo usar (algo común cuando publican código...)

Código Delphi [-]procedure  GetListInstalledUpdates;
var
  updateSession        : OleVariant;
  updateSearcher       : OleVariant;
  updateSearchResult   : OleVariant;
  updateEntry          : OleVariant;
  UpdateCollection     : OleVariant;
  oEnum                : IEnumvariant;
  iValue               : LongWord;
begin
  updateSession:= CreateOleObject('Microsoft.Update.Session');
  updateSearcher := updateSession.CreateUpdateSearcher;
  Writeln('Searching');
  //IUpdateSearcher::Search Method http://msdn.microsoft.com/en-us/library/aa386526%28v=VS.85%29.aspx
  updateSearcher.online:=False;
  updateSearchResult:= updateSearcher.Search(Format('IsInstalled = 1 and Type=%s',[QuotedStr('Software')]));
  UpdateCollection  := updateSearchResult.Updates;
  oEnum         := IUnknown(UpdateCollection._NewEnum) as IEnumVariant;
  //IUpdate Interface http://msdn.microsoft.com/en-us/library/aa386099%28v=VS.85%29.aspx
  while oEnum.Next(1, updateEntry, iValue) = 0 do
  begin
    Writeln(updateEntry.Title);
    updateEntry:=Unassigned;
  end;
  Writeln('Done');
end;