让对话框也支持多文档的使用

 

BOOL CApp::InitInstance(){///    m_pDocTemplate = new CMultiDocTemplate(        IDR_MSG,    //user define        RUNTIME_CLASS(MessageDoc),        RUNTIME_CLASS(MessageFrame),      // main SDI frame window        RUNTIME_CLASS(MessageView));    AddDocTemplate(m_pDocTemplate);    // Enable DDE Execute open    EnableShellOpen();    RegisterShellFileTypes(TRUE);    // Parse command line for standard shell commands, DDE, file open    CCommandLineInfo cmdInfo;    ParseCommandLine(cmdInfo);//.....................    ............}//..........public:    CMultiDocTemplate * m_pDocTemplate;//...........//响应函数 比如按钮void CApp::OnManageMessage() {    ASSERT(m_pDocTemplate != NULL);    CDocument* pDoc = NULL;    CFrameWnd* pFrame = NULL;    pDoc = m_pDocTemplate->CreateNewDocument();    if (pDoc != NULL)    {        pFrame = m_pDocTemplate->CreateNewFrame(pDoc, NULL);        if (pFrame != NULL)        {            m_pDocTemplate->SetDefaultTitle(pDoc);            if (!pDoc->OnNewDocument())            {                pFrame->DestroyWindow();                pFrame = NULL;            }            else                m_pDocTemplate->InitialUpdateFrame(pFrame, pDoc, TRUE);        }        else            delete pDoc;    }    if (pFrame == NULL ¦¦ pDoc == NULL)        AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);    else              .............}