CToolTipCtrl m_pToolTipCtrl不能在OnCreate()里?//内存异常

CToolTipCtrl m_pToolTipCtrl不能在OnCreate()里?//内存错误

C/C++ code

lass CMainFrame : public CFrameWnd类的声明一个  CToolTipCtrl m_pToolTipCtrl成员;

C/C++ code

 int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct){    if (CFrameWnd::OnCreate(lpCreateStruct) == -1)        return -1;    if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP        | CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||        !m_wndToolBar.LoadToolBar(IDR_MAINFRAME))    {        TRACE0("未能创建工具栏\n");        return -1;      // 未能创建    }    //////////////////////////////////////////////////////////////////////    m_Imagelist.Create(32,32,ILC_COLOR32 | ILC_MASK,0,0);  //创建图像列表    m_Imagelist.Add(AfxGetApp()->LoadIcon(IDI_ICON_SET));    m_Imagelist.Add(AfxGetApp()->LoadIcon(IDI_ICON_TIMER));    m_Imagelist.Add(AfxGetApp()->LoadIcon(IDI_ICON_PAN));    m_Imagelist.Add(AfxGetApp()->LoadIcon(IDI_ZOOM_IN));     m_Imagelist.Add(AfxGetApp()->LoadIcon(IDI_ZOOM_OUT));     //CListCtrl m_listCtrl;    //m_listCtrl.SetImageList(&m_Imagelist,LVSIL_NORMAL);    UINT nArray[5] = { ID_MENU_AUTOTEST, ID_MENU_PERIOD_CHECK, ID_TOOL_PAN,ID_TOOL_ZOOMIN,ID_TOOL_ZOOMOUT};      m_wndToolBar.SetButtons(nArray, 5);    m_wndToolBar.GetToolBarCtrl().SetButtonSize(CSize(41,41));    m_wndToolBar.GetToolBarCtrl().SetBitmapSize(CSize(36,36));        m_wndToolBar.GetToolBarCtrl().SetImageList(&m_Imagelist);    if (!m_wndStatusBar.Create(this) ||        !m_wndStatusBar.SetIndicators(indicators,          sizeof(indicators)/sizeof(UINT)))    {        TRACE0("未能创建状态栏\n");        return -1;      // 未能创建    }    // TODO: 如果不需要工具栏可停靠，则删除这三行    m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);    EnableDocking(CBRS_ALIGN_ANY);    DockControlBar(&m_wndToolBar);    CPAIBaseDialog::AddWndIdToMap(m_iWndID,this);    StartHeartbeat();    if (g_shUserType != 1)    {                HICON hIcon=AfxGetApp()->LoadIcon(IDI_ICON6);        m_Imagelist.Replace(0,hIcon);        hIcon = AfxGetApp()->LoadIcon(IDI_ICON7);        m_Imagelist.Replace(1,hIcon);        SignIcon=0;    }    m_pToolTipCtrl.Create(this);    m_pToolTipCtrl.AddTool(GetDlgItem(IDI_ICON6),"123");//这行代码编译过，运行内存错误!    return 0;}