WPF Ribbon - Dock area in Tabs header area

It is possible insert DockArea or other else docking element like it is on the picture. In WPF Ribbon.

enter image description here

Solution

You can use ribbon HelpPaneContentTemplate:

<ribbon:Ribbon.HelpPaneContentTemplate>
    <DataTemplate>
        <StackPanel Orientation="Horizontal">
            <TextBlock Text="Account: ..." VerticalAlignment="Center" />
            <Button Content="Sing out" Click="Button_Click" Margin="2,0,2,0" VerticalAlignment="Center" />
        </StackPanel>
    </DataTemplate>
</ribbon:Ribbon.HelpPaneContentTemplate>