文档/视图结构中的各个部分是如何联系到一起的[11]

                            // 修改了原始的文档

                            setdefaulttitle(pdocument);

                            if (!pdocument->onnewdocument())

                            {

                                   trace0("error: onnewdocument failed after trying to open a document - trying to continue.\n");

                            }

                     }

                     return null;        // open failed

              }

              pdocument->setpathname(lpszpathname);

       }

       cwinthread* pthread = afxgetthread();

       if (bcreated && pthread->m_pmainwnd == null)

       {

              pthread->m_pmainwnd = pframe;

       }

       initialupdateframe(pframe, pdocument, bmakevisible);