WPF TextBox with SpellCheck.IsEnabled="True" - No SpellChecking happening?

I just wanted to play around with WPF SpellCheck a little, but although the Attached Property is set, there's no underlining of whate开发者_JAVA百科ver I type.

SpellCheck.IsEnabled="True"

If I remember correctly, SpellCheck is supposed to add Menu Items to my ContextMenu as well, isn't it? That doesn't happen either...

BTW, my machine is running .Net4.

Do I have to enable this globally somewhere? All tutorials and so forth just mention setting SpellCheck.IsEnabled gets you going...

Make sure the required language pack is installed. refer this post for more info. http://social.msdn.microsoft.com/Forums/en/wpf/thread/c4a62da5-9a7d-4e1d-bcbc-12945046fc42