-#if defined(WINDOWSNT) || defined(MAC_OSX)
- MOUSE_WHEEL_EVENT, /* A mouse-wheel event is generated
- on WINDOWSNT or MAC_OSX by a
- wheel on a mouse (e.g., MS Intellimouse).
- The event contains a delta that corresponds
- to the amount and direction that the wheel
- is rotated. This delta is typically
- used to implement a scroll or zoom.
- .code gives the delta.
- .modifiers holds the state of the
- modifier keys.
+ WHEEL_EVENT, /* A wheel event is generated by a
+ wheel on a mouse (e.g., MS
+ Intellimouse).
+ .modifiers holds the rotate
+ direction (up or down), and the
+ state of the modifier keys.