MQL5 リファレンス標準ライブラリパネルとダイアログ CWndClientCreateBack CreateOnEventColorBackgroundColorBorderBorderTypeVScrolledHScrolledCreateBackCreateScrollVCreateScrollHOnResizeOnVScrollShowOnVScrollHideOnHScrollShowOnHScrollHideOnScrollLineDownOnScrollLineUpOnScrollLineLeftOnScrollLineRightRebound CreateBack 컨트롤의 배경 버튼을 생성합니다. virtual bool CreateBack() Return Value 성공시 true, 아니면 false. HScrolled CreateScrollV