MQL5 ReferenceStandard LibraryPanels and DialogsCWndClientOnScrollLineDown CreateOnEventColorBackgroundColorBorderBorderTypeVScrolledHScrolledCreateBackCreateScrollVCreateScrollHOnResizeOnVScrollShowOnVScrollHideOnHScrollShowOnHScrollHideOnScrollLineDownOnScrollLineUpOnScrollLineLeftOnScrollLineRightRebound OnScrollLineDown The virtual handler of the VScroll (vertical scroll) dependent control "ScrollLineDown" (vertical scroll line down) internal event. virtual bool OnScrollLineDown() Return Value true - event processed, otherwise - false. Note The base class method does nothing and always returns true. OnHScrollHide OnScrollLineUp