Can't seem to customize the window menu.

Under the windows platform, there's a hamburger menu with "Share" and "Settings". I've found I can customize the settings popup that appears http://stackoverflow.com/questions/35148751/windows-10-app-settings-menu-implementation, but I'd like to be able to customize what appears in there (and possibly even remove it). I am not familiar with universal apps, but I wonder if there would be a way to access the window object itself and I can probably work with msdn from there.