Doubt, adding several functions at the same event(GTK+)

[Fabio Gonzalez <fabiojosue gmail com>]

I have two doubts about GTK+. The first is when I call:

 gtk_signal_connect (widget, "key-press-event", G_CALLBACK (function1), NULL);

 and then:
 gtk_signal_connect (widget, "key-press-event", G_CALLBACK (function2), NULL);

 when the event occurs, both functions will be called? The second doubt is because when I call

 gtk_signal_connect (widget, "key-press-event", G_CALLBACK (function), NULL);

 and press one key on the widget function "function" is not called? What else to add missing?