Windows App SDK 1.2 is now online, here's what's new

Windows App SDK is a set of tools and APIs that developers can use in their Windows apps to deliver on a variety of devices using Windows 10 (version 1809 and later) and Windows 11 "Consistent" functionality. It's really important to understand that it doesn't replace existing application types like .NET or the Windows SDK, it just provides a unified API toolset that can be used to complement your existing applications. Today, Microsoft released version 1.2 of the Windows App SDK with many new features.

Perhaps the highlight of this release is the ability for third-party developers to create Widgets for their Win32 applications in the Windows 11 Insider Preview and test them locally. This is something Microsoft said it was working on in May and released more information more than a month ago. Interested developers can refer to this document for further guidance.

Windows App SDK 1.2 also enables developers to take advantage of WinUI 3’s latest media playback controls. They can also leverage Microsoft's Azure Communication Services to add voice and video calling capabilities to their applications in the cloud. This is the same technology used by Microsoft Teams.

HDR and Automatic Color Management (ACM) are also now supported through the DisplayInformation class of the Windows App SDK. It enables client applications to monitor application view changes with relative ease. Another interesting project is the ability to develop natively for the Arm64 architecture if you are using Visual Studio 17.3 Preview 2 or higher.

Other updates include improvements to .NET applications, Dynamic Refresh Rate (DRR) in Windows 11, and the AppNotificationBuilder component for easily creating and defining notifications. Microsoft also highlighted that the x64 binary footprint of Windows App SDK 1.2 is 11% smaller than version 1.1.5.

As far as next steps go, Microsoft is not aware of anything specific. It just mentioned that it's working with development partners to migrate their apps to WinUI 3 and the Windows App SDK. This is something the company has been doing as early as last year, when it encouraged developers to migrate from the Universal Windows Platform (UWP) to the Windows App SDK.

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