Ever wanted to get rid of the typical context menu that you get when you right click anywhere in Flash Player? Well Flex API does not provide any feature to stop this. However some genius mind created a hack to not let the Flash Player know that the right click has happened. Instead, just call a Flex method using ExternalInterface. And in this method, create the menu (or do whatever else you want).
P.S: All credits to custom-context-menu creators for developing the functionality!