How to customize Tab control

Hi,

Per documentation TabbedMdiHost.TabItemContainerStyle can be set to a custom style.

I defined style for AdvancedTabItem type

<Style x:Key="DefaultTabbedTemplateKey" TargetType="docking:AdvancedTabItem">

...

</Style>

and this style to set  to TabItemContainerStyle as follow

<Style x:Key="{x:Type docking:TabbedMdiHost}" TargetType="docking:TabbedMdiHost">

<Setter Property="TabItemContainerStyle" Value="{StaticResource DefaultTabbedTemplateKey}"/>

</Style>

Resource dictionary with these styles is also merged in app's resources as follow:

Application.Current.Resources.MergedDictionaries.Add(newResourceDictionary { Source = newUri(@"/somedll.dll;component/Resources/Generic.xaml", UriKind.Relative) });

But nothing changed and i see default style for tab.

Any additional steps should be done to apply custom style?

Thanks.