public override string ToString()
        {
            s = (LEN)base.Tag;

            Binding myBinding = new Binding("result");

            myBinding.Mode   = BindingMode.TwoWay;
            myBinding.Source = s;
            txtres.SetBinding(TextBox.TextProperty, myBinding);

            Binding myBinding2 = new Binding("var");

            myBinding2.Mode   = BindingMode.TwoWay;
            myBinding2.Source = s;
            txtvar.SetBinding(TextBox.TextProperty, myBinding2);


            Binding descbinding = new Binding("Description");

            descbinding.Mode   = BindingMode.TwoWay;
            descbinding.Source = s;
            txtdesc.SetBinding(TextBox.TextProperty, descbinding);

            return(base.ToString());
        }
        public override string ToString()
        {
            s = (LEN)base.Tag;

            Binding myBinding = new Binding("result");
            myBinding.Mode = BindingMode.TwoWay;
            myBinding.Source = s;
            txtres.SetBinding(TextBox.TextProperty, myBinding);

            Binding myBinding2 = new Binding("var");
            myBinding2.Mode = BindingMode.TwoWay;
            myBinding2.Source = s;
            txtvar.SetBinding(TextBox.TextProperty, myBinding2);


            Binding descbinding = new Binding("Description");
            descbinding.Mode = BindingMode.TwoWay;
            descbinding.Source = s;
            txtdesc.SetBinding(TextBox.TextProperty, descbinding);

            return base.ToString();
        }
 IF(LEN(@Nr_Documento) = 14)