Acessing Selected feature Attributes

Hi everyone,
I'm trying to have the user select a feature or a group of features
then access some of their aattirbutes and modify their selection
accordingly.
So, implementing ITool I got this from the sample to select:

OnMouseDown(LONG button, LONG shift, LONG x, LONG y)
    {

            IPointPtr pPoint1, pPoint2;
            ILayerPtr pLayer;
            IFeatureLayerPtr pFLayer;
            IDocumentPtr pDoc;
            IMapPtr iFocusMap, ipMap1;
            IScreenDisplayPtr ipScreen;
            IDisplayTransformationPtr ipDispTransform;
            IGeometryPtr ipGeometry;
            IEnvelopePtr pEnv(CLSID_Envelope), pEnv2(CLSID_Envelope);
            double up, down, left, right;
            long i=0, LayerCount;

            m_ipApp->get_Document(&pDoc);

            IMxDocumentPtr pMxDoc(pDoc);
            pMxDoc->get_FocusMap(&iFocusMap);
            pMxDoc->get_ActiveView(&m_ipActiveView);

            m_ipActiveView->get_ScreenDisplay(&ipScreen);
            ipScreen->get_DisplayTransformation(&ipDispTransform);
            ipDispTransform->ToMapPoint(x, y, &m_point);

            m_ipActiveView->HitTestMap(m_point, &iFocusMap);

            if(iFocusMap == 0)
            {
                return E_NOTIMPL;
            }

             IUnknownPtr ipUnknown;
            IUnknownPtr ipUnknown1;

            ipUnknown = iFocusMap;
            ipUnknown1 = ipMap1;

                //Ensure the Map is the FocusMap
                if (ipUnknown != ipUnknown1)
                {
                    pMxDoc->get_ActiveView(&m_ipActiveView);
                    m_ipActiveView->get_FocusMap(&iFocusMap);
                    m_ipActiveView->PartialRefresh(esriViewGraphics, 0, 0);
                }

            //Get the focus map
            IActiveViewPtr ipActiveView;
            m_ipActiveView->get_FocusMap(&iFocusMap);
            ipActiveView = iFocusMap;

            //Get the point to start the feedback with
            ipActiveView->get_ScreenDisplay(&ipScreen);
            ipScreen->get_DisplayTransformation(&ipDispTransform);
            ipDispTransform->ToMapPoint(x, y, &m_point);

            HWND hWnd;
          ipScreen->get_hWnd((OLE_HANDLE*) &hWnd);
            ::SetCapture(hWnd);
            m_inUse = true;
            return S_OK;

        return S_OK;

    }

OnMouseMove(LONG button, LONG shift, LONG x, LONG y)
    {

    IActiveViewPtr ipActiveView;
    IScreenDisplayPtr ipScreenDisplay;
    IDisplayTransformationPtr ipDispTransform;
    ISelectionPtr pSelection;
    IMapPtr ipMap;
    IPointPtr ipPoint;
    IDocumentPtr pDoc;

    m_ipApp->get_Document(&pDoc);

    IMxDocumentPtr pMxDoc(pDoc);
    pMxDoc->get_FocusMap(&ipMap);

    ipActiveView = ipMap;
    ipActiveView->get_ScreenDisplay(&ipScreenDisplay);

    //Start the feedback if this is the first mouse event
    if (m_ipEnvelopeFeedback == 0)
    {
        m_ipEnvelopeFeedback.CreateInstance(CLSID_NewEnvelopeFeedback);
        m_ipEnvelopeFeedback->putref_Display(ipScreenDisplay);
        m_ipEnvelopeFeedback->Start(m_point);
    }

    //Move the feedback to the new mouse coordinates
    //activeView->get_ScreenDisplay(&ipScreenDisplay);
    ipScreenDisplay->get_DisplayTransformation(&ipDispTransform);
    ipDispTransform->ToMapPoint(x, y, &ipPoint);
    m_ipEnvelopeFeedback->MoveTo(ipPoint);

    return S_OK;
    }

OnMouseUp(LONG button, LONG shift, LONG x, LONG y)
    {
    ::ReleaseCapture();

    //Get the search geometry
    long count;
    ISelectionPtr pSelection;
    IGeometryPtr ipGeometry;
    IEnvelopePtr ipEnvelope;
    IEnvelopePtr ipEnvelope2;

    if (m_ipEnvelopeFeedback == 0)
    {
        ipGeometry = m_point;
    }
    else
    {

        m_ipEnvelopeFeedback->Stop(&ipEnvelope);
        ipGeometry = ipEnvelope;
        VARIANT_BOOL check = VARIANT_FALSE;
        ipGeometry->get_IsEmpty(&check);

    if (check == VARIANT_TRUE)
            ipGeometry = m_point;
    }

    //Set the spatial reference of the search geometry to that of the Map
    IMapPtr ipMap;
    IDocumentPtr pDoc;

    m_ipApp->get_Document(&pDoc);

    IMxDocumentPtr pMxDoc(pDoc);
    pMxDoc->get_FocusMap(&ipMap);

    ISpatialReferencePtr ipSpatialReference;
    ipMap->get_SpatialReference(&ipSpatialReference);

    ipGeometry->putref_SpatialReference(ipSpatialReference);

    //Refresh the active view
    IActiveViewPtr ipActiveView;
    IViewManagerPtr ipViewManager(ipMap);
    ipActiveView = ipMap;
    ipMap->SelectByShape(ipGeometry, 0, VARIANT_FALSE);

// putting next chunk of code here

    ipActiveView->get_Extent(&ipEnvelope2);

    ipActiveView->PartialRefresh(esriViewGeoSelection, 0, ipEnvelope2);
    }
    m_ipEnvelopeFeedback = 0;
    m_inUse = false;

    return S_OK;
    }

First problem I'm have with this is I can only select with rectangles.
That is, clicking directly on a feature does not work. Next, I'm trying
to acess some of the attributes of the selection. A couple of notes:
there are two layers open in my test, I only want to access the
feautres from one of them. Anyway, the second chuck is:

    IEnumFeaturePtr ipEnumFeature;
    IEnumFeatureSetupPtr pIES(ipEnumFeature);
    ipMap->get_FeatureSelection(&pSelection);
    pIES->put_AllFields(VARIANT_TRUE);
    ipEnumFeature = pSelection;
    IFeaturePtr ipFeature;
    ipEnumFeature->Reset();
    ipEnumFeature->Next(&ipFeature);
    IQueryFilterPtr pQFilter(CLSID_QueryFilter);

    int i=0;
    VARIANT tnodein, tnodeout;

while(i<count)
{
        i++;
        ipEnumFeature->Next(&ipFeature);
        if(ipFeature == NULL) { ::MessageBox(0, "Feature is Null", "Start",
MB_OK);}
        ipFeature->get_Value(2, &tnodein);
        ipFeature->get_Value(7, &tnodeout);

}

Do I need IEnumFeatureSetup here? That where the error occurs at this
time, but if I don't use that then I get an runtime error at
"ipFeature->get_Value(2, &tnodein);" which puzzles me, since it could
just return NULL.

Any help would be much appreciated.