Wheel Event Handlers here.
(GraphicsLayer
  (anchor 0.00 0.00)
  (bounds 785.00 2128.00)
  (children 1
    (GraphicsLayer
      (bounds 785.00 2128.00)
      (contentsOpaque 1)
      (drawsContent 1)
      (backgroundColor #FFFFFF)
      (event region
        (rect (0,0) width=785 height=2128)
      (wheel event listener region
        (rect (128,120) width=422 height=442)
      )
      )
    )
  )
)