How can I use UIHierarchy.get_SelectedITems() in C++?

Visual Basic Code ::
 Dim UIH As UIHierarchy =
applicationObject.Windows.Item(Constants.vsWindowKindSolutionExplorer).Object
 Dim uiitem As UIHierarchyItem
   For Each uiitem In UIH.SelectedItems
     If TypeOf uiitem.Object Is Project Then
       project = uiitem.Object
     End If
   Next

C++ Code (incompleted) ::
 CComPtr<EnvDTE::Windows>    pWindows;
 CComPtr<EnvDTE::UIHierarchy>    pUIHierarchy;

 m_pDTE->get_Windows( &pWindows );

 LONG lItemCount, i;

 pWindows->get_Count( &lItemCount );
 for( i = 1; i <= lItemCount; i++ ) {
    CComPtr<EnvDTE::Window>    pWindow;
    EnvDTE::vsWindowType a_vsWindowType;

    pWindows->Item( CComVariant( i ), &pWindow );
    pWindow->get_Type( &a_vsWindowType );
    if( a_vsWindowType == EnvDTE::vsWindowTypeSolutionExplorer ) {
        pWindow->get_Object( (IDispatch **) &pUIHierarchy );
        break;
    }
 }

 pUIHierarchy->get_SelectedItems( (VARIANT *) ??????? );

If you know how to do in C/C++, please let me know.

Many thanks in advance.