DateTimeToString Xaml formatter

Hi,
I am trying to format a DateTime to a shorttime format in xaml, what is the correct synatax to apply the shorttime format?

This is what i have:

xmlns:Calendar="clr-namespace:ActiproSoftware.Windows.Controls.Calendar;assembly=ActiproSoftware.Shared.WPF30"


<Calendar:DateTimeToStringConverter x:Key="ShortTimeConverter" />


<TextBlock Text="{Binding EndTime,Converter={StaticResource ShortTimeConverter}}" TextWrapping="Wrap" FontSize="{Binding EndTimeFontSize}" Foreground="{Binding EndTimeForeground}" HorizontalAlignment="Right" VerticalAlignment="Bottom" Width="117" Height="37" SnapsToDevicePixels="True" />


How to I pass in the ShortTime parameter in Xaml?

Thanks,
Tom