private void rdbtnWPAddStopDevNon_MouseUp(object sender, MouseEventArgs e)
        {
            RadioGroup         radioGroup = sender as RadioGroup;
            RadioGroupViewInfo viewInfo   = radioGroup.GetViewInfo() as RadioGroupViewInfo;

            if (viewInfo.GetItemIndexByPoint(e.Location) == viewInfo.SelectedIndex)
            {
                radioGroup.SelectedIndex = -1;
                viewInfo.HitIndex        = -1;
            }
        }