Question: I'm making my first step in to creating Universal applications - does anyone know what the top bar control is in the Alarms and Clock app?

I noted that the middle section is a Pivot and it's switching between PivotItems - but when you change the top icons are highlighted based on the PivotItem

![Alarms and Clock](https://i.stack.imgur.com/h6s8e.png)

Is it just a Grid with different buttons that are highlighted depending on the SelectedIndex of the Pivot control? Or is it a specific control that hasn't been documented yet?

Answer: 
Have a look at the Pivot sample in the [Windows Universal Sample](https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/XamlPivot) repository on Github. Scenario 3 contains the customized pivot control with the style template.

[![enter image description here](https://i.stack.imgur.com/YVS0t.png)](https://i.stack.imgur.com/YVS0t.png)
You can always debug any Win10 application by running visual studio and attaching the debugger to the process (app) you want to look into. 

This will also give you all of the styles available and give you a better understanding of the layout. I demo'd this as part of the //BUILD tour earlier this year.