gint ui_dialog_about(GtkWindow *parent, gchar *title, gchar *message_format, ...);
gint ui_dialog_msg_question(GtkWindow *parent, gchar *title, gchar *message_format, ...);
gint ui_dialog_about(GtkWindow *parent, gchar *title, gchar *message_format, ...);
gint ui_dialog_msg_question(GtkWindow *parent, gchar *title, gchar *message_format, ...);