If you want to give access to help file from your program., then you may use this code. You may call a "search" bookmark of some help file.
procedure TForm1.Button1Click(Sender: TObject); var TempStr: string; begin TempStr:=''; Application.HelpFile:='C:\...\Help\Delphi3.HLP'; Application.HelpCommand(HELP_PARTIALKEY, LongInt(@TempStr)); end;