MQL5参考标准程序库面板和对话框CDialogCreateClientArea CreateOnEventCaptionAddCreateWhiteBorderCreateBackgroundCreateCaptionCreateButtonCloseCreateClientAreaOnClickCaptionOnClickButtonCloseClientAreaVisibleClientAreaLeftClientAreaTopClientAreaRightClientAreaBottomClientAreaWidthClientAreaHeightOnDialogDragStartOnDialogDragProcessOnDialogDragEnd CreateClientArea 创建依赖控件 (客户区域) virtual bool CreateClientArea() 返回值 true 如果成功, 否则 false。 CreateButtonClose OnClickCaption