Hi Pan,
I believe it is a combination of a listview and select.
By default your app would have the correct font already, All you need to do is apply the correct attributes to it.
To see the predefined styles you can browse the ui-dark.css nad ui-light.cxx that are included in your project References.
You can also download in psd format all of the assets (including the file picker) that has the style and spacing etc... from the design assets:
http://msdn.microsoft.com/library/windows/apps/hh779072
-Jeff
Jeff Sanders (MSFT)