#if defined(_WIN32)
void wm_drive_changed(MSG *msg, signal_user_data_t *ud);
#endif
+gpointer ghb_cache_volnames(signal_user_data_t *ud);
+void ghb_volname_cache_init(void);
+void ghb_update_destination_extension(signal_user_data_t *ud);
+void ghb_update_pending(signal_user_data_t *ud);
#endif // _CALLBACKS_H_