MQL5 ReferenceStandard LibraryPanels and DialogsCScrollCreateDec CreateOnEventMinPosMaxPosCurrPosCreateBackCreateIncCreateDecCreateThumbOnClickIncOnClickDecOnShowOnHideOnChangePosOnThumbDragStartOnThumbDragProcessOnThumbDragEndCalcPos CreateDec Creates decrement button of CScroll control. virtual bool CreateDec() Return Value true - successful, otherwise - false. CreateInc CreateThumb