onEvent is a "catch-all" event that is thrown when any event occurs.
Note: in 0.5.5 and lower, this event only occurs when the event that would normally be thrown hasn't been defined. (eg, if onMouseMove was defined, OnEvent wouldn't be thrown when the mouse moves)
onClose | onDblClick | onEvent | onGetFocus | onHeaderSelect | onKeyDown | onKeyUp | onMainEvent | onMouseDown | onMouseMove | onMouseUp | onRedraw | onResize