Horizontal mouse scrolling using mousewheel

1

Ok this is really frustrating… Can someone show me an example of a horizontal mouse scrolling of a movieclip using the mousewheel?
I have code that makes content scroll vertically and i have changed it to be horizontal. The scrollbar works but the mousewheel listener does not. so far it only moves one direction. It seems the delta property only works vertically.

private function mouseWheelListener(event:MouseEvent):void
{
trace(event.delta);
//mycode
}
stage.addEventListener(MouseEvent.MOUSE_WHEEL, mouseWheelListener);

thanks in advance!