Использование файла помощи

procedure TForm1.Contents1Click(Sender: TObject);
begin
  Application.HelpCommand(HELP_CONTENTS, 0);
end;

procedure TForm1.SearchforHelpOn1Click(Sender: TObject);
begin
  Application.HelpCommand(HELP_PARTIALKEY, 0);
end;

procedure TForm1.HowtoUseHelp1Click(Sender: TObject);
begin
  Application.HelpCommand(HELP_HELPONHELP, 0);
end;