This event occurs whenever a mouse wheel is goes down.

property OnMouseWheelDown: TVFMouseWheelUpDownEvent;

__property TVFMouseWheelUpDownEvent OnMouseWheelDown;

event TVFMouseWheelUpDownEvent OnMouseWheelDown;

Event OnMouseWheelDown As TVFMouseWheelUpDownEvent

OnMouseWheelDown

__property TVFMouseWheelUpDownEvent OnMouseWheelDown;

OnMouseWheelDown

published OnMouseWheelDown;