Passing a Visibility Enumeration Value as a ConverterParameter

Question

I would like to know how to pass the System.Windows.Visibility Enum as a converter parameter:

<Bdl:BdlRoundButton Name="BtAddUser" Grid.Row="1" Grid.Column="2" Color="Orange" Image="Create" Command="{StaticResource GetSequence}" Margin="5,0,0,0"
                            Visibility="{Binding Converter={StaticResource StringNotNullToVisibilityConverter}, ConverterParameter={System.Windows.Visibility.Hidden}}"/>