Mixing GTK+ signal with GTKmm

[Paulo Flabiano Smorigo <pfsmorigo gmail com>]

Hi everybody,

I have a GTKmm application and since last week it's using a c library.
I want to create a custom signal in this c library so when an event
occurs in this library, my application knows.

How do I implement a signal in this library and link it to a callback
in my gtkmm application?

I've tried to find on the web a way to implement a dispatcher in gtk+
but didn't found...

Sorry if it's not the correct place to post this question since it's
more a gtk+ doubt than gtkmm but I think this involve both...

Thanks in advance,
Paulo Flabiano Smorigo