Alt+Tab
Collapsed
<Grid>
<TextBlock FontSize="50" Text="Your controls here!" />
<Grid Background="Black" x:Name="overlay" Visibility="Collapsed" />
</Grid>
Window.Current.Activated += Current_Activated;
private void Current_Activated(object sender, Windows.UI.Core.WindowActivatedEventArgs e)
{
if (e.WindowActivationState == Windows.UI.Core.CoreWindowActivationState.Deactivated)
{
overlay.Visibility = Visibility.Visible;
}
else
{
overlay.Visibility = Visibility.Collapsed;
}
}