Module communication ….

Question

I’m working on a single modular application which has several levels and on these levels I do have a module which I use as a ‘Main Carrier module *’ for other sub modules. Now one of these Sub modules has a component attached, and I do need to ‘CLICK’ a button in that component which in return activates a certain ‘Click of a Button’ in the ‘Main Carrier module *’ through a Button Click Handler or else? I’m mostly interested in the idea and how to write and use the ‘Button Click handler’ etc.

* Is NOT the Application module!!!

Any help would be appreciated very much since I have been looking for a couple of days and could not find anything.

Thanks in advance aktell