How do I add text inside a shape in XAML - xaml

Question

I am working on a Metro App using C++ and XAML. I want to create a polygon shape and add text inside it.
At first I thought of defining my own Controltemplate and apply it to Textblock but unfortunately it does not understand TargetType = "TextBlock".
Secondly, I thought of inheriting the Polygon class and see if I can do anything there but that class is sealed.
Any ideas on how to achieve this?

Answer 1

In WPF XAML you could do something simple like this:
<Grid Width="60" Height="100">
<Ellipse Fill="Yellow"/>
<TextBlock VerticalAlignment="Center" HorizontalAlignment="Center" Text="Hello"/>
</Grid>
To get text in the centre of a yellow ellipse.
I'm guessing something that simple will work on WinRT.

Answer 2

You can use something like this with ContentControl or so many other controls:
<ContentControl Width="200" Height="100" Content="Something">
<ContentControl.Template>
<ControlTemplate>
<Grid>
<Ellipse Fill="Red"/>
<TextBlock Text="{Binding Content,RelativeSource={RelativeSource FindAncestor,AncestorType=ContentControl}}"
TextWrapping="Wrap"
VerticalAlignment="Center"
HorizontalAlignment="Center"/>
</Grid>
</ControlTemplate>
</ContentControl.Template>
</ContentControl>