What's new: Glib::RefPtr<>

• We can only ref and unref GObjects, and the C++ wrapper must stay alive as long as the C instance.

• You don't care so use the RefPtr<> smartpointer.

• For instance, Gdk::Bitmap can only be instantiated with a create() function: Glib::RefPtr<Gdk::Bitmap> bitmap = Gdk::Bitmap::create(window, data, width, height); if(bitmap) { int depth = bitmap->get_depth(). }

• Never ref/unref again.