void CXTPTreeBase::OnRButtonDown(UINT /*nFlags*/, CPoint point)
{
    if (m_pTreeCtrl->GetStyle() & TVS_SINGLEEXPAND)
    {
        m_pTreeCtrl->Default();
        return;
    }

    // hittest to get the tree item under the cursor
    // and select it.
    UINT uFlags		= 0;
    HTREEITEM hItem = m_pTreeCtrl->HitTest(point, &uFlags);
    if (hItem != NULL && (uFlags & TVHT_ONITEM) != 0)
    {
        // if the item is not selected, clear previous
        // selections and select the item under cursor.
        if (!IsSelected(hItem))
        {
            SelectAll(FALSE);
            SelectItem(hItem);
        }
    }
    else
    {
        // clear previous selections.
        SelectAll(FALSE);
    }

    // call Default() so correct notification messages are
    // sent such as TVN_BEGINRDRAG.
    m_pTreeCtrl->Default();

    CWnd* pParent = m_pTreeCtrl->GetOwner();
    CWnd* pGrandParent = (pParent != NULL) ? pParent->GetOwner() : NULL;

    HWND hWnd = (pGrandParent != NULL) ? pGrandParent->m_hWnd : NULL;

    if (::IsWindow(hWnd))
    {
        // construct a NMHDR struct...
        NMHDR mHDR;
        mHDR.hwndFrom = pParent->m_hWnd;
        mHDR.code = NM_RCLICK;
        mHDR.idFrom = m_pTreeCtrl->GetDlgCtrlID();

        // and send a WM_NOTIFY message to our owner.
        SendNotify(&mHDR);
    }
}