请教大家，BREW里的这些定义是什么意思，希望能有比较详细点的解答。

[allen1986]

typedef struct _IWindow IWindow;
QINTERFACE(IWindow)
{
// Enables/Disables the window. Window controls will not process
// events if the window is disabled.
void (*Enable)(IWindow * po, boolean bEnable);

// Redraws the window if enabled
void (*Redraw)(IWindow * po);

// Handles the events routed to the window
boolean (*HandleEvent)(IWindow * po, AEEEvent eCode, uint16 wParam, uint32 dwParam);

// Releases the window resources
void (*Delete)(IWindow * po);
};

#define IWINDOW_Enable(p) GET_PVTBL(p, IWindow)->Enable(p, TRUE)
#define IWINDOW_Disable(p) GET_PVTBL(p, IWindow)->Enable(p, FALSE)
#define IWINDOW_Redraw(p) GET_PVTBL(p, IWindow)->Redraw(p)
#define IWINDOW_HandleEvent(p, e, w, dw) GET_PVTBL(p, IWindow)->HandleEvent(p, e, w, dw)
#define IWINDOW_Delete(p) GET_PVTBL(p, IWindow)->Delete(p)

[zsf81]

疯，这和BREW没关系，C里面这样写的多的是，虚表，用来封外用函数。只需提供H可供第三方用，不用提供实例函数。

[半吊子全栈工匠]

和BREW没关系,用虚表来封装外用函数