Пример KeyDown компонента DBNavigator

procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
const
  (* Классный участок кода от Graphical Gnome *)
  KeyBtn: array[TNavigateBtn] of record
    Key: Word;
    Btn: TNavigateBtn;
  end = (
    (Key: VK_F1; Btn: nbFirst),
    (Key: VK_F2; Btn: nbPrior),
    (Key: VK_F3; Btn: nbNext),
    (Key: VK_F4; Btn: nbLast),
    (Key: VK_F5; Btn: nbInsert),
    (Key: VK_F6; Btn: nbDelete),
    (Key: VK_F7; Btn: nbEdit),
    (Key: VK_F8; Btn: nbPost),
    (Key: VK_F9; Btn: nbCancel),
    (Key: VK_F10; Btn: nbRefresh)
    );
var
  i: TNavigateBtn;
begin
  for i := nbFirst to nbRefresh do
    if KeyBtn[i].Key = Key then
    begin
      DBNavigator1.BtnClick(KeyBtn[i].Btn);
      Exit;
    end;
end;