Dispatched when a mouse wheel is spun over an InteractiveObject instance.
If the target is a text field, the text scrolls as the default behavior. Only available on Microsoft Windows operating systems.
Defines the value of the type property of a mouseWheel event object.
scrollBase.MouseScroll([delta])
                  scrollBase.MouseScroll([delta])
                  | Variable | Description | 
|---|---|
| delta | Optional: The number of lines that each notch on the mouse wheel represents. Integer. |