TControl = class(TComponent)    // 控件的Windows功能从TControl开始
  private
    // ------------ 事件声明（18个事件，大多数是鼠标事件）------------ 
    FOnResize: TNotifyEvent;
    FOnCanResize: TCanResizeEvent;
    FOnConstrainedResize: TConstrainedResizeEvent;
    // 停泊与拖动
    FOnStartDock: TStartDockEvent;
    FOnEndDock: TEndDragEvent;
    FOnStartDrag: TStartDragEvent;
    FOnEndDrag: TEndDragEvent;
    FOnDragDrop: TDragDropEvent;
    FOnDragOver: TDragOverEvent;
    FOnContextPopup: TContextPopupEvent;
    // 鼠标事件
    FOnClick: TNotifyEvent;
    FOnDblClick: TNotifyEvent;
    FOnMouseWheel: TMouseWheelEvent;
    FOnMouseWheelDown: TMouseWheelUpDownEvent;
    FOnMouseWheelUp: TMouseWheelUpDownEvent;
    FOnMouseDown: TMouseEvent;
    FOnMouseMove: TMouseMoveEvent;
    FOnMouseUp: TMouseEvent;
    // super 发现所有成员数据都是私有的，万一要需要使用，可以用属性来公开
  protected
    // 18个保护事件
    property OnClick: TNotifyEvent read FOnClick write FOnClick stored IsOnClickStored;
    property OnDblClick: TNotifyEvent read FOnDblClick write FOnDblClick;
    property OnMouseDown: TMouseEvent read FOnMouseDown write FOnMouseDown;
    property OnMouseMove: TMouseMoveEvent read FOnMouseMove write FOnMouseMove;
    property OnMouseUp: TMouseEvent read FOnMouseUp write FOnMouseUp;
    property OnMouseWheel: TMouseWheelEvent read FOnMouseWheel write FOnMouseWheel;
    property OnMouseWheelDown: TMouseWheelUpDownEvent read FOnMouseWheelDown write FOnMouseWheelDown;
    property OnMouseWheelUp: TMouseWheelUpDownEvent read FOnMouseWheelUp write FOnMouseWheelUp;
    //
    property OnCanResize: TCanResizeEvent read FOnCanResize write FOnCanResize;
    property OnConstrainedResize: TConstrainedResizeEvent read FOnConstrainedResize write FOnConstrainedResize;
    property OnContextPopup: TContextPopupEvent read FOnContextPopup write FOnContextPopup;
    property OnDragDrop: TDragDropEvent read FOnDragDrop write FOnDragDrop;
    property OnDragOver: TDragOverEvent read FOnDragOver write FOnDragOver;
    property OnEndDock: TEndDragEvent read FOnEndDock write FOnEndDock;
    property OnEndDrag: TEndDragEvent read FOnEndDrag write FOnEndDrag;
    property OnResize: TNotifyEvent read FOnResize write FOnResize;
    property OnStartDock: TStartDockEvent read FOnStartDock write FOnStartDock;
    property OnStartDrag: TStartDragEvent read FOnStartDrag write FOnStartDrag;
  public
    // super 发现所有成员数据都是私有的，万一要需要使用，可以用属性来公开
    // 构造函数等等，但没有公共事件
  published
    // 9个发布属性，但都不是事件
  end

  TWinControl = class(TControl)
  private
    // 9个事件，图形控件也有
    FOnEnter: TNotifyEvent;
    FOnExit: TNotifyEvent;
    FOnKeyDown: TKeyEvent;
    FOnKeyPress: TKeyPressEvent;
    FOnKeyUp: TKeyEvent;
    FOnGetSiteInfo: TGetSiteInfoEvent;
    FOnDockDrop: TDockDropEvent;
    FOnDockOver: TDockOverEvent;
    FOnUnDock: TUnDockEvent;
  protected
    // 9个保护事件
    property OnDockDrop: TDockDropEvent read FOnDockDrop write FOnDockDrop;
    property OnDockOver: TDockOverEvent read FOnDockOver write FOnDockOver;
    property OnEnter: TNotifyEvent read FOnEnter write FOnEnter;
    property OnExit: TNotifyEvent read FOnExit write FOnExit;
    property OnGetSiteInfo: TGetSiteInfoEvent read FOnGetSiteInfo write FOnGetSiteInfo;
    property OnKeyDown: TKeyEvent read FOnKeyDown write FOnKeyDown;
    property OnKeyPress: TKeyPressEvent read FOnKeyPress write FOnKeyPress;
    property OnKeyUp: TKeyEvent read FOnKeyUp write FOnKeyUp;
    property OnUnDock: TUnDockEvent read FOnUnDock write FOnUnDock;
  public
    // 没有公共事件
  published
    // 没有发布属性
end;