Windowing

Windows.ApplicationModel.Core.CoreApplication.CreateNewView();

Windows.UI.ViewManagement.ApplicationViewSwitcher.SwitchAsync();

Windows.UI.ViewManagement.ApplicationViewSwitcher.TryShowAsStandaloneAsync();

New View must call:

Window.Activate();

 Multi-View on Launch

// Opt-in to the activcation policy
Windows.UI.ViewManagement.ApplicationViewSwitcher.DisableSystemViewActivationPolicy();

// Prevent flicker on launch
Windows.UI.ViewManagement.ApplicationViewSwitcher.DisableShowingMainViewOnActivation();