CXTTreeCtrl Context Menu

BEGIN_MESSAGE_MAP(CTestAppView, CTreeView)
    //{{AFX_MSG_MAP(CTestAppView)
    ON_WM_RBUTTONDOWN()
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

void CTestAppView::OnRButtonDown(UINT nFlags, CPoint point) 
{
    CPoint pt = point;
    ClientToScreen(&pt);
    
    if (pt.x == -1 && pt.y == -1)
    {
        // keystroke invocation
        CRect rect;
        GetClientRect(rect);
        ClientToScreen(rect);
        
        pt = rect.TopLeft();
        pt.Offset(5, 5);
    }
    
    CMenu menu;
    VERIFY(menu.LoadMenu(CG_IDR_POPUP_TEST_APP_VIEW));
    
    CMenu* pPopup = menu.GetSubMenu(0);
    ASSERT(pPopup != NULL);
    CWnd* pWndPopupOwner = this;
    
    while (pWndPopupOwner->GetStyle() & WS_CHILD)
        pWndPopupOwner = pWndPopupOwner->GetParent();
    
    pPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, pt.x, pt.y,
        pWndPopupOwner);
    
    CTreeView::OnRButtonDown(nFlags, point);
}