Occurs when the mouse wheel is moved while the mouse pointer is over a UI element.
A token that is returned from the function, which you can optionally retain as a variable. If you intend to call RemoveEventListener to remove the handler, you will need this token.
Event Handler Parameters
The object that invoked the event.
mouseWheelEventArgs.Delta reports a number for the mouse wheel. Positive values are moves away from user, negative values are moves towards the user. (Silverlight 3)
mouseEventArgs.GetPosition(element).X identifies the x-coordinate position of the mouse.
mouseEventArgs.GetPosition(element).Y identifies the y-coordinate position of the mouse.
mouseEventArgs.Shift determines whether the SHIFT key is down.
mouseEventArgs.Ctrl determines whether the CTRL key is down.
mouseEventArgs.Source: Reports the object that raised the event.