* <interface>
* <object class="GtkDialog" id="dialog1">
* <child internal-child="vbox">
- * <object class="GtkVBox" id="vbox1">
+ * <object class="GtkBox" id="vbox1">
* <property name="border-width">10</property>
* <child internal-child="action_area">
- * <object class="GtkHButtonBox" id="hbuttonbox1">
+ * <object class="GtkButtonBox" id="hbuttonbox1">
* <property name="border-width">20</property>
* <child>
* <object class="GtkButton" id="ok_button">