;   {

              pDocument = CreateNewDocument();

              ASSERT(pFrame == NULL);     

              bCreated = TRUE;

       }

                

    //如果第一次创建文档则也要创建框架窗口。

       if (pFrame == NULL)

       {

              ASSERT(bCreated);



              // create frame - set as main document frame

              BOOL bAutoDelete = pDocument->m_bAutoDelete;

              pDocument->m_bAutoDelete = FALSE;

              pFrame = CreateNewFrame(pDocument, NULL);

              pDocument->m_bAutoDelete = bAutoDelete;

                                

       }



       if (lpszPathName == NULL)

       {

              // 为新文档设置默认标题

              SetDefaultTitle(pDocument);

        ……

      //一般的时候重载OnNewDocument初始化一些数据,如果返回FALSE，表示初始化失//败，销毁窗口。

              if (!pDocument->OnNewDocument())

              {

                                                

                     if (bCreated)

                            pFrame->DestroyWindow();