Reveal is built in to some controls, such as ListView and NavigationView, that you will see later. For other controls, you can enable it by applying a theme style.
Open MainPage.xaml, add a new horizontal stack panel under the one used as a toolbar, and add a grid with buttons to define a calculator, as shown in the following markup:
<StackPanel Orientation="Horizontal"> <Grid Background="DarkGray" Margin="10" Padding="5" Name="gridCalculator"> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <Button Grid.Row="0" Grid.Column="0" ...
