solidworks中动态创建树控件问题

我写了一段代码想动态创建树控件，但是运行到    Root=pTreeCtrl.InsertItem(_T("station 1"))时出现Assertion failed错误Afxcmn.inl line:242 ASSERT(IsWindow(m_wnd)),请帮忙看看，如何解决。

  谢谢了。

         CComBSTR ImageFile;
    CComPtr<IModelViewManager> iModelViewMgr;
    CComPtr<IModelDoc2> iModelDoc;
    CComPtr<IFeatMgrView> iFeatMgrView;
    CComPtr<IUnknown> iUnknown;
    HRESULT hr;
    HTREEITEM Root;   
    long paneType;
    CTreeView* pTreeView;
    LPRECT lpRect=NULL;
    VARIANT_BOOL bRet;

    hr=iSwApp->get_IActiveDoc2(&iModelDoc);
    hr=iModelDoc->get_ModelViewManager(&iModelViewMgr);

    hr=iBmp->CreateBitmapFileFromResource(IDB_BITMAP6,&ImageFile);

    hr=iModelViewMgr->CreateFeatureMgrControl2(ImageFile,_T("MSComctlLib.TreeCtrl"),_T(""),_T(""),swFeatMgrPaneTop,&iFeatMgrView);   
   

    hr=iFeatMgrView->IGetControl(&iUnknown);

    hr=iUnknown->QueryInterface(IID_IOleControl,(void**)&pTreeView);
    CTreeCtrl& pTreeCtrl = pTreeView->GetTreeCtrl();

   
    Root=pTreeCtrl.InsertItem(_T("station 1"));
    hr=iModelDoc->put_FeatureManagerSplitterPosition(0);
    hr=iFeatMgrView->ActivateView(&paneType);