[glade--]How to connect object 1 signal to object 2 slot?

Hello,

I'm new to gtk+, gtkmm and glade. I am trying to connect a signal 
(changed) from a GtkCombo to a signal handler (on_combo_changed()) from 
a GtkEntry derived object. It doesn't seem to be a complicated task if 
not using glade: I would use on my main window constructor:

m_combo1.signal_clicked().connect( SigC::slot(m_entry1, 
&My_Entry::on_combo_changed));

, where My_Entry is the class that inherits GktEntry), but I wasn't able 
to find a simple way to do this in glade (appart from editing the _glade 
files).

So, how can I do this? Am I so mad about trying this connection :)?

Thomas