一.包容

如同适配器,调用方法时,调用内部接口方法,对其内部接口进行了封装

// Interface IY
@H_301_7@virtual void __stdcall Fy() { m_pIY->Fy() ;} //@N

二.聚合

特殊的包容形式,把内部的接口指针直接暴露给外部

HRESULT @H_301_7@__stdcall CA::QueryInterface(@H_301_7@const IID& iid,@H_301_7@void** ppv)
{     
    @H_301_7@if (iid == IID_IUnknown)
    {
        *ppv = @H_301_7@static_cast<IUnknown*>(@H_301_7@this) ; 
    }
    @H_301_7@else if (iid == IID_IX)
    {
        *ppv = @H_301_7@static_cast<IX*>(@H_301_7@this) ;
    }
    @H_301_7@else if (iid == IID_IY)
    {
        trace("Return inner component's IY interface.") ;
@H_301_7@#if 1
        // You can query for the interface.
       @H_301_7@return m_pUnknownInner->QueryInterface(iid,ppv) ; //@N
@H_301_7@#else
        // Or you can return a cached pointer.
        *ppv = m_pIY ;   //@N
        // Fall through so it will get AddRef'ed
@H_301_7@#endif
    }
    @H_301_7@else
    {
        *ppv = NULL ;
        @H_301_7@return E_NOINTERFACE ;
    }
    @H_301_7@reinterpret_cast<IUnknown*>(*ppv)->AddRef() ;
    @H_301_7@return S_OK ;
}

http://www.yesky.com/74/1754074.shtml

包容

http://www.cnblogs.com/shipfi/archive/2007/02/15/651294.html

http://blog.csdn.net/insidekernel/archive/2008/03/11/2169599.aspx