You can check the sample on how to do this from Offical Microsoft Samples on GitHub, as can be found here , but I will summarize quickly here. Another simpler implementation can be found on Mike Taut's Blog .
Since you did not specify a development language, I will assume C # and XAML.
Create your own button in XAML that will be pressed to create a new window:
<Button
Content="Create"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Click="OnCreate" />
In the code behind, add the OnCreate click handler:
async void OnCreate(object sender, RoutedEventArgs e)
{
CoreApplicationView newCoreView = CoreApplication.CreateNewView();
ApplicationView newAppView = null;
int mainViewId = ApplicationView.GetApplicationViewIdForWindow(
CoreApplication.MainView.CoreWindow);
await newCoreView.Dispatcher.RunAsync(
CoreDispatcherPriority.Normal,
() =>
{
newAppView = ApplicationView.GetForCurrentView();
Window.Current.Content = new SubWindowUserControl();
Window.Current.Activate();
});
await ApplicationViewSwitcher.TryShowAsStandaloneAsync(
newAppView.Id,
ViewSizePreference.UseHalf,
mainViewId,
ViewSizePreference.UseHalf);
}
. ( ), , , SubWindowUserControl, ( ), .
API ApplicationViewSwitcher.
XAML, async, OnCreate, :
await newCoreView.Dispatcher.RunAsync(
CoreDispatcherPriority.Normal,
() =>
{
newAppView = ApplicationView.GetForCurrentView();
Window.Current.Content = new Frame();
(Window.Current.Content as Frame).Navigate(typeof(<your_page>));
Window.Current.Activate();
});
, XAML , Frame, XAML.

, !