[Freeswitch-users] mod_managed - beginner's question about an event listener module

I've looked at mod_managed documentation and can see how to write an API command or a dialplan application, but could you give me a hint how to implement an automatically starting 'background' service that will listen to FS events? The module should start automatically at FS startup and should react to conference-related events. I've looked through Dave Kompel's examples but didn't find such example (or didin't understand the code well enough) Thanks RG