MQL5 ReferenceStandard LibraryPanels and DialogsCScrollOnClickInc CreateOnEventMinPosMaxPosCurrPosCreateBackCreateIncCreateDecCreateThumbOnClickIncOnClickDecOnShowOnHideOnChangePosOnThumbDragStartOnThumbDragProcessOnThumbDragEndCalcPos OnClickInc The virtual handler of the control "ClickInc" (left mouse button click on the increment button) internal event. virtual bool OnClickInc() Return Value true - event processed, otherwise - false. CreateThumb OnClickDec