A java app I wrote is being used on a Mac OS X. The OS has a drop down menu at the top of the screen that allows users to quit the app. This is not part of my app. When the user closes the app by this way and not by clicking on the "X" icon that is part of the app window, the window closing event that has been added to the frame is not fired. Is this a bug is there another window event I need to be using.