GType gtk_vscrollbutton_get_type (void);
GtkWidget* gtk_vscrollbutton_new (GtkAdjustment *adjustment);
-gint gtk_vscrollbutton_scroll (GtkVScrollbutton *scrollbutton);
+gboolean gtk_vscrollbutton_scroll (GtkVScrollbutton *scrollbutton);
#ifdef __cplusplus
}