How to recognize scroll gesture on top of menu bar in OS X?
<p>I came across an app where in the user can scroll from the top of the screen and it would initiate certain features of the app. </p>

<p>I created a new project and overrode <code>scrollWheel</code> in view controller. This seems to work but the scroll has to happen on the window. How can I listen to a scroll gesture on the top of the menu bar ?</p>