gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_CLOSE);
gtk_container_set_border_width (GTK_CONTAINER (GTK_DIALOG (dialog)), 5);
gtk_box_set_spacing (GTK_BOX (content_area), 2);
gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_CLOSE);
gtk_container_set_border_width (GTK_CONTAINER (GTK_DIALOG (dialog)), 5);
gtk_box_set_spacing (GTK_BOX (content_area), 2);