[Glade-users] images on a button on a toolbar

[davidgn servidor unam mx (davidgn servidor unam mx)]

Hello. I need to modify the image on a button on a toolbar to give some
visual feedback, but I dont know, what widget is the child of the
button?
GtkImage? or GtkPixmap? or some other widget that eventually leads to
one of those two?

And, how can I pick it in order to modify it? from
GTK_BIN(my_gtk_button)->child ?

Have been looking through the archives, and found something similar with
labels, but being images, I'm not sure

Thank you for any pointer.