// event.direction = "vertical" or "horizontal" direction the wheel is being rolled
// event.shiftPressed = boolean, shift key is held
// event.ctrlPressed = boolean, ctrl key is held
// event.altPressed = boolean, alt key is held
// event.keyModifiers = bitmask of keys pressed
// event.point {x,y} = The co-ordinates of the mouse cursor relative to the top-left of the screen when the wheel is being rolled.
// event.direction = "vertical" or "horizontal" direction the wheel is being rolled
// event.shiftPressed = boolean, shift key is held
// event.ctrlPressed = boolean, ctrl key is held
// event.altPressed = boolean, alt key is held
// event.keyModifiers = bitmask of keys pressed
// event.point {x,y} = The co-ordinates of the mouse cursor relative to the top-left of the screen when the wheel is being rolled.