Windows 10 SDK Preview Build 17677 available now!

Windows 10 SDK Preview Build 17677 available now!

Today, we released a new Windows 10 Preview Build of the SDK to be used in conjunction with Windows 10 Insider Preview (Build 17677 or greater). The Preview SDK Build 17677 contains bug fixes and under development changes to the API surface area.

The Preview SDK can be downloaded from developer section on Windows Insider.

For feedback and updates to the known issues, please see the developer forum. For new developer feature requests, head over to our Windows Platform UserVoice.

Things to note:

• This build works in conjunction with previously released SDKs and Visual Studio 2017. You can install this SDK and still also continue to submit your apps that target Windows 10 Creators build or earlier to the store.
• The Windows SDK will now formally only be supported by Visual Studio 2017 and greater. You can download the Visual Studio 2017 here.
• This build of the Windows SDK will install on Windows 10 Insider Preview and supported Windows operating systems.

Known Issues

Installation on an operating system that is not a Windows 10 Insider Preview  build is not supported and may fail.

Windows Device Portal

Please note that there is a known issue in this Windows Insider build that prevents the user from enabling Developer Mode through the For developers settings page.

Unfortunately, this means that you will not be able to remotely deploy a UWP application to your PC or use Windows Device Portal on this build. There are no known workarounds at the moment. Please skip this flight if you rely on these features.

Missing Contract File

The contract Windows.System.SystemManagementContract is not included in this release. In order to access the following APIs, please use a previous Windows IoT extension SDK with your project. This bug will be fixed in a future preview build of the SDK.

The following APIs are affected by this bug:

namespace Windows.Services.Cortana {
  public sealed class CortanaSettings     
}
namespace Windows.System {
  public enum AutoUpdateTimeZoneStatus
  public static class DateTimeSettings
  public enum PowerState
  public static class ProcessLauncher
  public sealed class ProcessLauncherOptions
  public sealed class ProcessLauncherResult
  public enum ShutdownKind
  public static class ShutdownManager
  public struct SystemManagementContract
  public static class TimeZoneSettings
}

API Spot Light:

Check out LauncherOptions.GroupingPreference.

namespace Windows.System {
  public sealed class FolderLauncherOptions : ILauncherViewOptions {
    ViewGrouping GroupingPreference { get; set; }
  }
  public sealed class LauncherOptions : ILauncherViewOptions {
    ViewGrouping GroupingPreference { get; set; }
  }

This release contains the new LauncherOptions.GroupingPreference property to assist your app in tailoring its behavior for Sets. Watch the presentation here.

What’s New:

MC.EXE

We’ve made some important changes to the C/C++ ETW code generation of mc.exe (Message Compiler):

The “-mof” parameter is deprecated. This parameter instructs MC.exe to generate ETW code that is compatible with Windows XP and earlier. Support for the “-mof” parameter will be removed in a future version of mc.exe.

As long as the “-mof” parameter is not used, the generated C/C++ header is now compatible with both kernel-mode and user-mode, regardless of whether “-km” or “-um” was specified on the command line. The header will use the _ETW_KM_ macro to automatically determine whether it is being compiled for kernel-mode or user-mode and will call the appropriate ETW APIs for each mode.

• The only remaining difference between “-km” and “-um” is that the EventWrite[EventName] macros generated with “-km” have an Activity ID parameter while the EventWrite[EventName] macros generated with “-um” do not have an Activity ID parameter.

The EventWrite[EventName] macros now default to calling EventWriteTransfer (user mode) or EtwWriteTransfer (kernel mode). Previously, the EventWrite[EventName] macros defaulted to calling EventWrite (user mode) or EtwWrite (kernel mode).

• The generated header now supports several customization macros. For example, you can set the MCGEN_EVENTWRITETRANSFER macro if you need the generated macros to call something other than EventWriteTransfer.
• The manifest supports new attributes.
  • Event “name”: non-localized event name.
  • Event “attributes”: additional key-value metadata for an event such as filename, line number, component name, function name.
  • Event “tags”: 28-bit value with user-defined semantics (per-event).
  • Field “tags”: 28-bit value with user-defined semantics (per-field – can be applied to “data” or “struct” elements).
• You can now define “provider traits” in the manifest (e.g. provider group). If provider traits are used in the manifest, the EventRegister[ProviderName] macro will automatically register them.
• MC will now report an error if a localized message file is missing a string. (Previously MC would silently generate a corrupt message resource.)
• MC can now generate Unicode (utf-8 or utf-16) output with the “-cp utf-8” or “-cp utf-16” parameters.

API Updates and Additions

When targeting new APIs, consider writing your app to be adaptive in order to run correctly on the widest number of Windows 10 devices. Please see Dynamically detecting features with API contracts (10 by 10) for more information.

The following APIs have been added to the platform since the release of 17134.

namespace Windows.ApplicationModel {
  public sealed class AppInstallerFileInfo
  public sealed class LimitedAccessFeatureRequestResult
  public static class LimitedAccessFeatures
  public enum LimitedAccessFeatureStatus
  public sealed class Package {
    IAsyncOperation<PackageUpdateAvailabilityResult> CheckUpdateAvailabilityAsync();
    AppInstallerFileInfo GetAppInstallerFileInfo();
  }
  public enum PackageUpdateAvailability
  public sealed class PackageUpdateAvailabilityResult
}
namespace Windows.ApplicationModel.Calls {
  public sealed class VoipCallCoordinator {
    IAsyncOperation<VoipPhoneCallResourceReservationStatus> ReserveCallResourcesAsync();
  }
}
namespace Windows.ApplicationModel.Store.Preview {
  public static class StoreConfiguration {
    public static bool IsPinToDesktopSupported();
    public static bool IsPinToStartSupported();
    public static bool IsPinToTaskbarSupported();
    public static void PinToDesktop(string appPackageFamilyName);
    public static void PinToDesktopForUser(User user, string appPackageFamilyName);
  }
}
namespace Windows.ApplicationModel.Store.Preview.InstallControl {
  public enum AppInstallationToastNotificationMode
  public sealed class AppInstallItem {
    AppInstallationToastNotificationMode CompletedInstallToastNotificationMode { get; set; }
    AppInstallationToastNotificationMode InstallInProgressToastNotificationMode { get; set; }
    bool PinToDesktopAfterInstall { get; set; }
    bool PinToStartAfterInstall { get; set; }
    bool PinToTaskbarAfterInstall { get; set; }
  }
  public sealed class AppInstallManager {
    bool CanInstallForAllUsers { get; }
  }
  public sealed class AppInstallOptions {
    AppInstallationToastNotificationMode CompletedInstallToastNotificationMode { get; set; }
    bool InstallForAllUsers { get; set; }
    AppInstallationToastNotificationMode InstallInProgressToastNotificationMode { get; set; }
    bool PinToDesktopAfterInstall { get; set; }
    bool PinToStartAfterInstall { get; set; }
    bool PinToTaskbarAfterInstall { get; set; }
    bool StageButDoNotInstall { get; set; }
  }
  public sealed class AppUpdateOptions {
    bool AutomaticallyDownloadAndInstallUpdateIfFound { get; set; }
  }
}
namespace Windows.Devices.Enumeration {
  public sealed class DeviceInformation {
    string ContainerDeviceId { get; }
    DevicePhysicalInfo PhysicalInfo { get; }
  }
  public enum DeviceInformationKind {
    DevicePanel = 8,
  }
  public sealed class DeviceInformationPairing {
    public static bool TryRegisterForAllInboundPairingRequestsWithProtectionLevel(DevicePairingKinds pairingKindsSupported, DevicePairingProtectionLevel minProtectionLevel);
  }
  public sealed class DevicePhysicalInfo
  public enum PanelDeviceShape
}
namespace Windows.Devices.Enumeration.Pnp {
  public enum PnpObjectType {
    DevicePanel = 8,
  }
}
namespace Windows.Devices.Lights {
  public sealed class LampArray
  public enum LampArrayKind
  public sealed class LampInfo
  public enum LampPurposes : uint
}
namespace Windows.Devices.Lights.Effects {
  public interface ILampArrayEffect
  public sealed class LampArrayBitmapEffect : ILampArrayEffect
  public sealed class LampArrayBitmapRequestedEventArgs
  public sealed class LampArrayBlinkEffect : ILampArrayEffect
  public sealed class LampArrayColorRampEffect : ILampArrayEffect
  public sealed class LampArrayCustomEffect : ILampArrayEffect
  public enum LampArrayEffectCompletionBehavior
  public sealed class LampArrayEffectPlaylist : IIterable<ILampArrayEffect>, IVectorView<ILampArrayEffect>
  public enum LampArrayEffectStartMode
  public enum LampArrayRepetitionMode
  public sealed class LampArraySolidEffect : ILampArrayEffect
  public sealed class LampArrayUpdateRequestedEventArgs
}
namespace Windows.Devices.Sensors {
  public sealed class SimpleOrientationSensor {
    public static IAsyncOperation<SimpleOrientationSensor> FromIdAsync(string deviceId);
    public static string GetDeviceSelector();
  }
}
namespace Windows.Devices.SmartCards {
  public static class KnownSmartCardAppletIds
  public sealed class SmartCardAppletIdGroup {
    string Description { get; set; }
    IRandomAccessStreamReference Logo { get; set; }
    ValueSet Properties { get; }
    bool SecureUserAuthenticationRequired { get; set; }
  }
  public sealed class SmartCardAppletIdGroupRegistration {
    string SmartCardReaderId { get; }
    IAsyncAction SetPropertiesAsync(ValueSet props);
  }
}
namespace Windows.Devices.WiFi {
  public enum WiFiPhyKind {
    He = 10,
  }
}
namespace Windows.Graphics.Capture {
  public sealed class GraphicsCaptureItem {
    public static GraphicsCaptureItem CreateFromVisual(Visual visual);
  }
}
namespace Windows.Graphics.Imaging {
  public sealed class BitmapDecoder : IBitmapFrame, IBitmapFrameWithSoftwareBitmap {
    public static Guid HeifDecoderId { get; }
    public static Guid WebpDecoderId { get; }
  }
  public sealed class BitmapEncoder {
    public static Guid HeifEncoderId { get; }
  }
}
namespace Windows.Management {
  public static class MdmRegistrationManager
}
namespace Windows.Management.Deployment {
  public enum DeploymentOptions : uint {
    ForceUpdateFromAnyVersion = (uint)262144,
  }
  public sealed class PackageManager {
    IAsyncOperationWithProgress<DeploymentResult, DeploymentProgress> DeprovisionPackageForAllUsersAsync(string packageFamilyName);
  }
  public enum RemovalOptions : uint {
    RemoveForAllUsers = (uint)524288,
  }
}
namespace Windows.Management.Policies {
  public static class NamedPolicy {
    public static void SetPolicyAtPath(string accountId, string area, string name, NamedPolicyData2 value);
    public static void SetPolicyAtPathForUser(User user, string accountId, string area, string name, NamedPolicyData2 value);
  }
  public sealed class NamedPolicyData2
}
namespace Windows.Media.Core {
  public sealed class MediaStreamSample {
    IDirect3DSurface Direct3D11Surface { get; }
    public static MediaStreamSample CreateFromDirect3D11Surface(IDirect3DSurface surface, TimeSpan timestamp);
  }
}
namespace Windows.Media.Devices.Core {
  public sealed class CameraIntrinsics {
    public CameraIntrinsics(Vector2 focalLength, Vector2 principalPoint, Vector3 radialDistortion, Vector2 tangentialDistortion, uint imageWidth, uint imageHeight);
  }
}
namespace Windows.Media.MediaProperties {
  public sealed class ImageEncodingProperties : IMediaEncodingProperties {
    public static ImageEncodingProperties CreateHeif();
  }
  public static class MediaEncodingSubtypes {
    public static string Heif { get; }
  }
}
namespace Windows.Media.Streaming.Adaptive {
  public enum AdaptiveMediaSourceResourceType {
    MediaSegmentIndex = 5,
  }
}
namespace Windows.Security.Authentication.Web.Provider {
  public sealed class WebAccountProviderInvalidateCacheOperation : IWebAccountProviderBaseReportOperation, IWebAccountProviderOperation
  public enum WebAccountProviderOperationKind {
    InvalidateCache = 7,
  }
  public sealed class WebProviderTokenRequest {
    string Id { get; }
  }
}
namespace Windows.Security.DataProtection {
  public enum UserDataAvailability
  public sealed class UserDataAvailabilityStateChangedEventArgs
  public sealed class UserDataBufferUnprotectResult
  public enum UserDataBufferUnprotectStatus
  public sealed class UserDataProtectionManager
  public sealed class UserDataStorageItemProtectionInfo
  public enum UserDataStorageItemProtectionStatus
}
namespace Windows.Services.Cortana {
  public sealed class CortanaActionableInsights
  public sealed class CortanaActionableInsightsOptions
}
namespace Windows.Services.Store {
  public sealed class StoreContext {
    IAsyncOperation<StoreRateAndReviewResult> RequestRateAndReviewAppAsync();
    IAsyncOperation<IVectorView<StoreQueueItem>> SetInstallOrderForAssociatedStoreQueueItemsAsync(IIterable<StoreQueueItem> items);
  }
  public sealed class StoreQueueItem {
    IAsyncAction CancelInstallAsync();
    IAsyncAction PauseInstallAsync();
    IAsyncAction ResumeInstallAsync();
  }
  public sealed class StoreRateAndReviewResult
  public enum StoreRateAndReviewStatus
}
namespace Windows.Storage.Provider {
  public enum StorageProviderHydrationPolicyModifier : uint {
    AutoDehydrationAllowed = (uint)4,
  }
}
namespace Windows.System {
  public sealed class FolderLauncherOptions : ILauncherViewOptions {
    ViewGrouping GroupingPreference { get; set; }
  }
  public static class Launcher {
    public static IAsyncOperation<bool> LaunchFolderPathAsync(string path);
    public static IAsyncOperation<bool> LaunchFolderPathAsync(string path, FolderLauncherOptions options);
    public static IAsyncOperation<bool> LaunchFolderPathForUserAsync(User user, string path);
    public static IAsyncOperation<bool> LaunchFolderPathForUserAsync(User user, string path, FolderLauncherOptions options);
  }
  public sealed class LauncherOptions : ILauncherViewOptions {
    ViewGrouping GroupingPreference { get; set; }
  }
namespace Windows.System.UserProfile {
  public sealed class AssignedAccessSettings
}
namespace Windows.UI.Composition {
  public sealed class AnimatablePropertyInfo : CompositionObject
  public enum AnimationPropertyAccessMode
  public enum AnimationPropertyType
  public class CompositionAnimation : CompositionObject, ICompositionAnimationBase {
    void SetAnimatableReferenceParameter(string parameterName, IAnimatable source);
  }
  public enum CompositionBatchTypes : uint {
    AllAnimations = (uint)5,
    InfiniteAnimation = (uint)4,
  }
  public sealed class CompositionGeometricClip : CompositionClip
  public class CompositionObject : IAnimatable, IClosable {
    void GetPropertyInfo(string propertyName, AnimatablePropertyInfo propertyInfo);
  }
  public sealed class Compositor : IClosable {
    CompositionGeometricClip CreateGeometricClip();
  }
  public interface IAnimatable
}
namespace Windows.UI.Composition.Interactions {
  public sealed class InteractionTracker : CompositionObject {
    IReference<float> PositionDefaultAnimationDurationInSeconds { get; set; }
    IReference<float> ScaleDefaultAnimationDurationInSeconds { get; set; }
    int TryUpdatePositionWithDefaultAnimation(Vector3 value);
    int TryUpdateScaleWithDefaultAnimation(float value, Vector3 centerPoint);
  }
}
namespace Windows.UI.Notifications {
  public sealed class ScheduledToastNotification {
    public ScheduledToastNotification(DateTime deliveryTime);
    IAdaptiveCard AdaptiveCard { get; set; }
  }
  public sealed class ToastNotification {
    public ToastNotification();
    IAdaptiveCard AdaptiveCard { get; set; }
  }
}
namespace Windows.UI.Shell {
  public sealed class TaskbarManager {
    IAsyncOperation<bool> IsSecondaryTilePinnedAsync(string tileId);
    IAsyncOperation<bool> RequestPinSecondaryTileAsync(SecondaryTile secondaryTile);
    IAsyncOperation<bool> TryUnpinSecondaryTileAsync(string tileId);
  }
}
namespace Windows.UI.StartScreen {
  public sealed class StartScreenManager {
    IAsyncOperation<bool> ContainsSecondaryTileAsync(string tileId);
    IAsyncOperation<bool> TryRemoveSecondaryTileAsync(string tileId);
  }
}
namespace Windows.UI.ViewManagement {
  public sealed class ApplicationView {
    bool IsTabGroupingSupported { get; }
  }
  public sealed class ApplicationViewTitleBar {
    void SetActiveIconStreamAsync(RandomAccessStreamReference activeIcon);
  }
  public enum ApplicationViewWindowingMode {
    CompactOverlay = 3,
    Maximized = 4,
  }
  public enum ViewGrouping
  public sealed class ViewModePreferences {
    ViewGrouping GroupingPreference { get; set; }
  }
}
namespace Windows.UI.ViewManagement.Core {
  public sealed class CoreInputView {
    bool TryHide();
    bool TryShow();
    bool TryShow(CoreInputViewKind type);
  }
  public enum CoreInputViewKind
}
namespace Windows.UI.Xaml.Automation {
  public sealed class AutomationElementIdentifiers {
    public static AutomationProperty IsDialogProperty { get; }
  }
  public sealed class AutomationProperties {
    public static DependencyProperty IsDialogProperty { get; }
    public static bool GetIsDialog(DependencyObject element);
    public static void SetIsDialog(DependencyObject element, bool value);
  }
}
namespace Windows.UI.Xaml.Automation.Peers {
  public class AppBarButtonAutomationPeer : ButtonAutomationPeer, IExpandCollapseProvider {
    ExpandCollapseState ExpandCollapseState { get; }
    void Collapse();
    void Expand();
  }
  public class AutomationPeer : DependencyObject {
    bool IsDialog();
    virtual bool IsDialogCore();
  }
}
namespace Windows.UI.Xaml.Controls {
  public class AppBarElementContainer : ContentControl, ICommandBarElement, ICommandBarElement2
  public enum BackgroundSizing
  public sealed class Border : FrameworkElement {
    BackgroundSizing BackgroundSizing { get; set; }
    public static DependencyProperty BackgroundSizingProperty { get; }
  }
  public class ContentPresenter : FrameworkElement {
    BackgroundSizing BackgroundSizing { get; set; }
    public static DependencyProperty BackgroundSizingProperty { get; }
  }
  public class Control : FrameworkElement {
    BackgroundSizing BackgroundSizing { get; set; }
    public static DependencyProperty BackgroundSizingProperty { get; }
    CornerRadius CornerRadius { get; set; }
    public static DependencyProperty CornerRadiusProperty { get; }
    bool UseSystemValidationVisuals { get; set; }
    public static DependencyProperty UseSystemValidationVisualsProperty { get; }
  }
  public class DropDownButton : Button
  public class Grid : Panel {
    BackgroundSizing BackgroundSizing { get; set; }
    public static DependencyProperty BackgroundSizingProperty { get; }
  }
  public class NavigationView : ContentControl {
    bool IsTopNavigationForcedHidden { get; set; }
    NavigationViewOrientation Orientation { get; set; }
    UIElement TopNavigationContentOverlayArea { get; set; }
    UIElement TopNavigationLeftHeader { get; set; }
    UIElement TopNavigationMiddleHeader { get; set; }
    UIElement TopNavigationRightHeader { get; set; }
  }
  public enum NavigationViewOrientation
  public sealed class PasswordBox : Control {
    bool CanPasteClipboardContent { get; }
    public static DependencyProperty CanPasteClipboardContentProperty { get; }
    void PasteFromClipboard();
  }
  public class RelativePanel : Panel {
    BackgroundSizing BackgroundSizing { get; set; }
    public static DependencyProperty BackgroundSizingProperty { get; }
  }
  public class RichEditBox : Control {
    RichEditTextDocument RichEditDocument { get; }
    FlyoutBase SelectionFlyout { get; set; }
    public static DependencyProperty SelectionFlyoutProperty { get; }
    event TypedEventHandler<RichEditBox, RichEditBoxSelectionChangingEventArgs> SelectionChanging;
  }
  public sealed class RichEditBoxSelectionChangingEventArgs
  public sealed class RichTextBlock : FrameworkElement {
    void CopySelectionToClipboard();
  }
  public class StackPanel : Panel, IInsertionPanel, IScrollSnapPointsInfo {
    BackgroundSizing BackgroundSizing { get; set; }
    public static DependencyProperty BackgroundSizingProperty { get; }
  }
  public sealed class TextBlock : FrameworkElement {
    void CopySelectionToClipboard();
  }
  public class TextBox : Control {
    bool CanPasteClipboardContent { get; }
    public static DependencyProperty CanPasteClipboardContentProperty { get; }
    bool CanRedo { get; }
    public static DependencyProperty CanRedoProperty { get; }
    bool CanUndo { get; }
    public static DependencyProperty CanUndoProperty { get; }
    FlyoutBase SelectionFlyout { get; set; }
    public static DependencyProperty SelectionFlyoutProperty { get; }
    event TypedEventHandler<TextBox, TextBoxSelectionChangingEventArgs> SelectionChanging;
    void CopySelectionToClipboard();
    void CutSelectionToClipboard();
    void PasteFromClipboard();
    void Redo();
    void Undo();
  }
  public sealed class TextBoxSelectionChangingEventArgs
  public class TreeView : Control {
    bool CanDragItems { get; set; }
    public static DependencyProperty CanDragItemsProperty { get; }
    bool CanReorderItems { get; set; }
    public static DependencyProperty CanReorderItemsProperty { get; }
    Style ItemContainerStyle { get; set; }
    public static DependencyProperty ItemContainerStyleProperty { get; }
    StyleSelector ItemContainerStyleSelector { get; set; }
    public static DependencyProperty ItemContainerStyleSelectorProperty { get; }
    TransitionCollection ItemContainerTransitions { get; set; }
    public static DependencyProperty ItemContainerTransitionsProperty { get; }
    DataTemplate ItemTemplate { get; set; }
    public static DependencyProperty ItemTemplateProperty { get; }
    DataTemplateSelector ItemTemplateSelector { get; set; }
    public static DependencyProperty ItemTemplateSelectorProperty { get; }
    event TypedEventHandler<TreeView, TreeViewDragItemsCompletedEventArgs> DragItemsCompleted;
    event TypedEventHandler<TreeView, TreeViewDragItemsStartingEventArgs> DragItemsStarting;
  }
  public sealed class TreeViewDragItemsCompletedEventArgs
  public sealed class TreeViewDragItemsStartingEventArgs
  public sealed class WebView : FrameworkElement {
    event TypedEventHandler<WebView, WebViewWebResourceRequestedEventArgs> WebResourceRequested;
  }
  public sealed class WebViewWebResourceRequestedEventArgs
}
namespace Windows.UI.Xaml.Controls.Primitives {
  public class FlyoutBase : DependencyObject {
    bool IsOpen { get; }
    FlyoutShowMode ShowMode { get; set; }
    public static DependencyProperty ShowModeProperty { get; }
    public static DependencyProperty TargetProperty { get; }
    void Show(FlyoutShowOptions showOptions);
  }
  public enum FlyoutPlacementMode {
    BottomLeftJustified = 7,
    BottomRightJustified = 8,
    LeftBottomJustified = 10,
    LeftTopJustified = 9,
    RightBottomJustified = 12,
    RightTopJustified = 11,
    TopLeftJustified = 5,
    TopRightJustified = 6,
  }
  public enum FlyoutShowMode
  public sealed class FlyoutShowOptions : DependencyObject
}
namespace Windows.UI.Xaml.Hosting {
  public sealed class XamlBridge : IClosable
}
namespace Windows.UI.Xaml.Input {
  public sealed class FocusManager {
    public static event EventHandler<GettingFocusEventArgs> GettingFocus;
    public static event EventHandler<FocusManagerGotFocusEventArgs> GotFocus;
    public static event EventHandler<LosingFocusEventArgs> LosingFocus;
    public static event EventHandler<FocusManagerLostFocusEventArgs> LostFocus;
  }
  public sealed class FocusManagerGotFocusEventArgs
  public sealed class FocusManagerLostFocusEventArgs
  public sealed class GettingFocusEventArgs : RoutedEventArgs {
    Guid CorrelationId { get; }
  }
  public sealed class LosingFocusEventArgs : RoutedEventArgs {
    Guid CorrelationId { get; }
  }
}
namespace Windows.UI.Xaml.Markup {
  public sealed class FullXamlMetadataProviderAttribute : Attribute
  public interface IXamlBindScopeDiagnostics
}
namespace Windows.UI.Xaml.Media.Animation {
  public class BasicConnectedAnimationConfiguration : ConnectedAnimationConfiguration
  public sealed class BrushTransition : Transition
  public sealed class ConnectedAnimation {
    ConnectedAnimationConfiguration Configuration { get; set; }
  }
  public class ConnectedAnimationConfiguration
  public class DirectConnectedAnimationConfiguration : ConnectedAnimationConfiguration
  public class GravityConnectedAnimationConfiguration : ConnectedAnimationConfiguration
  public enum SlideNavigationTransitionEffect
  public sealed class SlideNavigationTransitionInfo : NavigationTransitionInfo {
    SlideNavigationTransitionEffect Effect { get; set; }
    public static DependencyProperty EffectProperty { get; }
  }
}
namespace Windows.Web.UI.Interop {
  public sealed class WebViewControl : IWebViewControl {
    event TypedEventHandler<WebViewControl, object> GotFocus;
    event TypedEventHandler<WebViewControl, object> LostFocus;
  }
  public sealed class WebViewControlProcess {
    string Partition { get; }
  }
  public sealed class WebViewControlProcessOptions {
    string Partition { get; set; }
  }
}

Source: Windows 10 SDK Preview Build 17677 available now!