MFC中的视图文档结构有CHtmlView，可以展示网页，其原理是IWebBrowser的封装，我们当然可以自己封装一个html控件，不多利用现有类来派生更加简单。

　　由于CHtmlView是视图文档结构中的一部分，需要CHtmlView视图从中剥离出来。只用重载下面三个函数。

1 BEGIN_MESSAGE_MAP(CHTMLCtrl, CHtmlView)    2     //{
    {AFX_MSG_MAP(CHTMLCtrl)    3     ON_WM_DESTROY()    4     ON_WM_MOUSEACTIVATE()    5     //}}AFX_MSG_MAP    6 END_MESSAGE_MAP()    7 afx_msg void OnDestroy();  8 afx_msg int  OnMouseActivate(CWnd* pDesktopWnd,UINT nHitTest,UINT message);  9 10 virtual void PostNcDestroy() {};

1 ////    2 // Override to avoid CView stuff that assumes a frame.    3 //    4 void CHTMLCtrl::OnDestroy()    5 {    6     IHTMLDocument2Ptr pHTMLDoc2 = NULL;    7      8     pHTMLDoc2 = this->GetHtmlDocument();    9      10     if (pHTMLDoc2)   11     {   12         pHTMLDoc2->Release();   13     }   14     15     // This is probably unecessary since ~CHtmlView does it, but   16     // safer to mimic CHtmlView::OnDestroy.   17     if (m_pBrowserApp)   18     {   19         m_pBrowserApp->Release();   20         m_pBrowserApp = NULL;   21     }   22 23     CWnd::OnDestroy(); // bypass CView doc/frame stuff   24 }   25 26 ////   27 // Override to avoid CView stuff that assumes a frame.   28 //   29 int CHTMLCtrl::OnMouseActivate(CWnd* pDesktopWnd, UINT nHitTest, UINT msg)   30 {   31     // bypass CView doc/frame stuff   32     return CWnd::OnMouseActivate(pDesktopWnd, nHitTest, msg);   33 }