The only documentation I have been able to find on integrating an application with the Messaging Menu is old and out of date: http://gnomejournal.org/article/67/an-introduction-to-the-message-indicator. And even that didn't have documentation for the whole API. Is there are any documentation for libindicate, either the python or C version?
Ubuntu – Developer documentation for the Messaging Menu
application-developmentdevelopmentdocumentationindicatormessaging-menu
Best Answer
Try the
libindicate-docpackage (and then look at what it installed withdpkg -L libindicate-doc). That should contain what you need.