API Reference TestUIElementsVCL Gamolf.RTL.Joystick.DirectInput.Win TGamolfJoystickDirectInputJoyCaps TGamolfJoystickDirectInputJoyCaps.ZMiddle Field On this page Definition Definition Unit: Gamolf.RTL.Joystick.DirectInput.Win Package: TestUIElementsVCL Delphi Copy var ZMiddle: single Value Single