新插入的Part在结构树不显示

我NewFrom一个新的Part，把它AddProduct到Product中，空间中已显示模型，结构树上不显示，右键点击打开子树，能显示我插入的part。
CATIModelEvents *piModelEventNewFeat = NULL;
rc = spObjectProduct->QueryInterface (IID_CATIModelEvents, (void**)&piModelEventNewFeat);
if (SUCCEEDED(rc))
{
        CATBaseUnknown * iObject=NULL;
        CATBaseUnknown * iParent=NULL;
        spObjectProduct->QueryInterface (IID_CATBaseUnknown, (void**)&iObject);
        spRootPro->QueryInterface (IID_CATBaseUnknown, (void**)&iParent);
        CATCreate notif (iObject, iParent);
        piModelEventNewFeat->Dispatch(notif);
        iObject->Release();
        iObject=NULL;
        iParent->Release();
        iParent=NULL;
        piModelEventNewFeat->Release();
        piModelEventNewFeat=NULL;
}

好吧，原来只需要Redraw一下就可以了