class WEL_SCROLLER Ancestors ANY WEL_SB_CONSTANTS WEL_SCROLL_BAR_CONSTANTS Clients EV_SCROLLABLE_AREA_IMP WEL_COMPOSITE_WINDOW* WEL_SCROLLER Suppliers BOOLEAN INTEGER_32 WEL_COMPOSITE_WINDOW* WEL_SCROLLER WEL_SCROLL_BAR_INFO