Работа с цифровой клавиатурой при выключенном NumLock

Code:

procedure TForm1.AppOnMessage(var Msg: TMsg; var Handled: Boolean);

var

  ccode: Word;

begin

  case Msg.Message of

    WM_KEYDOWN, WM_KEYUP:

      begin

        if (GetKeyState(VK_NUMLOCK) >= 0)  {NumLock not active} and

          ((Msg.lParam and $1000000) = 0)  {not a gray key} then

        begin

          ccode := 0;

          case Msg.wParam of

            VK_HOME: ccode   := VK_NUMPAD7;

            VK_UP: ccode     := VK_NUMPAD8;

            VK_PRIOR: ccode  := VK_NUMPAD9;

            VK_LEFT: ccode   := VK_NUMPAD4;

            VK_CLEAR: ccode  := VK_NUMPAD5;

            VK_RIGHT: ccode  := VK_NUMPAD6;

            VK_END: ccode    := VK_NUMPAD1;

            VK_DOWN: ccode   := VK_NUMPAD2;

            VK_NEXT: ccode   := VK_NUMPAD3;

            VK_INSERT: ccode := VK_NUMPAD0;

            VK_DELETE: ccode := VK_DECIMAL;

          end; {Case}

          if ccode <> 0 then

            Msg.wParam := ccode;

        end; {If}

      end; {Case Msg.Message}

  end; {Case}

end;

procedure TForm1.FormCreate(Sender: TObject);

begin

  Application.OnMessage := AppOnMessage;

end;