PsppireWindow *psppire_window_register_lookup (PsppireWindowRegister *wr, const gchar *name);
-void psppire_window_register_foreach (PsppireWindowRegister *wr, GHFunc func, PsppireWindow *);
+void psppire_window_register_foreach (PsppireWindowRegister *wr, GHFunc func,
+ gpointer);
void psppire_window_register_minimise_all (PsppireWindowRegister *wr);
+gint psppire_window_register_n_items (PsppireWindowRegister *wr);
+
G_END_DECLS