When creating a widget for GtkComboBox, we need to set at least one entry. This because Glade will not generate XML's property inside interface's file by default (in this case: a bug). Say your entry is "Bug" string. Then in your code:
GtkWidget *combobox; combobox = glade_xml_get_widget (gladexml, "combobox"); /* remove our tricky entry, first entry */ gtk_combo_box_remove_text (GTK_COMBO_BOX (combobox), 0) /* our combo box is now ready... */ gtk_combo_box_prepend_text (GTK_COMBO_BOX (combobox), "Hey");
Have a try, it was fixed at least for me ;)