Автор: http://www.swissdelphicenter.ch

uses
  MMSYSTEM;

var
  MyJoy: TJoyInfo;
  ErrorResult: MMRESULT;
begin
  ErrorResult := joyGetPos(joystickid1, @MyJoy);
  if ErrorResult = JOYERR_NOERROR then
  begin
    TrackBar1.Position := MyJoy.wypos;
    TrackBar2.Position := MyJoy.wxpos;
    RadioButton1.Checked := (MyJoy.wbuttons and joy_button1) > 0;
    RadioButton2.Checked := (MyJoy.wbuttons and joy_button2) > 0;
  end
  else
    case ErrorResult of
      MMSYSERR_NODRIVER: ShowMessage('No Joystick driver present');
      MMSYSERR_INVALPARAM: ShowMessage('Invalid Joystick Paramameters');
      JOYERR_UNPLUGGED: ShowMessage('Joystick is Unplugged');
    else
      ShowMessage('Unknown error with Joystick');
    end;

end;