From: Joe Krahn <krahn@ni...> - 2006-10-01 22:02:46
There are some strange features with mouse wheel callbacks. In Win32,
the MouseWheel callback is ignored unless there is also a Mouse
callback. If there is just a mouse callback, the wheel event is
converted to a state defined by buttons 3-6. This hack should not be
needed now that there is a proper MouseWheel callback. Should this hack
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