The Windows App SDK has revolutionized how developers can create applications for Windows. This toolset provides a modern and flexible platform for developing desktop experiences on Windows 10 and Windows 11, integrating technologies such as WinUI 3, notifications, localized resources, and a simplified API architecture.
In this comprehensive guide, we'll cover everything you need to know about the Windows App SDK : from its key features and competitive advantages to deployment methods, compatibility with existing projects, and much more. If you're a developer or just starting out in Windows development, you'll want to learn about this powerful tool that Microsoft has made available.
What is Windows App SDK?
The Windows App SDK is a unified set of APIs and tools provided by Microsoft that allows Windows desktop applications to access modern features previously limited to certain types of UWP apps. Through this SDK, modern components can be integrated into applications developed using technologies such as .NET (Windows Forms, WPF) or Win32 with C++.
This is not a replacement for the traditional Windows SDK , nor is it intended to replace existing project types. Its main objective is to complement these solutions with a common set of APIs accessible across multiple versions of Windows, from Windows 11 to Windows 10 version 1809 and later. For more information on the evolution of Windows, you can read about how the end of support for Windows 10 will force many to upgrade their PCs.
What technologies does the Windows App SDK include?
This SDK incorporates a number of key components that enable desktop applications to have a modern and consistent experience, regardless of their underlying technology. These are the main ones:
- WindowsUI 3: The native graphical interface framework for desktop applications. Compatible with C++ or .NET applications, WinUI 3 enables you to create beautiful, responsive, and accessible interfaces.
- DWriteCore: Enables advanced, hardware-independent text rendering. Includes support for Microsoft ClearType, subpixels, hardware acceleration, and multi-format text.
- MRT Core: Application resource manager, facilitating multilingual support, scales, contrasts, and variants, without depending on the app logic.
- App lifecycle management: Through specific APIs you can control everything from multiple instances to rich activations or power management.
- Local and push notifications from the cloud: Compatible with Azure to send notifications to your users, both online and offline.
- Window management: Modern APIs to create and manage windows in your application in a controlled manner.
Competitive advantages of the SDK
Perhaps the greatest strength of the Windows App SDK is that it decouples app development from the operating system release cycle . This means you can take advantage of new features without waiting for users to upgrade their version of Windows.
By using NuGet, the SDK allows for faster update delivery , avoiding reliance on annual operating system updates. Currently, there is approximately one new version every six months.
Furthermore, the Windows App SDK unifies the development experience for Win32, .NET, UWP, and other applications, making it easy to access modern features from any technology, whether it's a WPF app, a WinForms app, or a native application with or without XAML. If you've had issues with time zone changes on your PC, this tool could simplify managing certain aspects of your application.
Compatibility with different versions of Windows
One of the biggest headaches in Windows development has always been version compatibility. The Windows App SDK solves much of that, as its APIs work from Windows 10 version 1809 onwards, including Windows 11.
This eliminates the need to write adaptive code based on the operating system version, reducing complexity and improving code reliability. For those experiencing slowness issues with Explorer.exe on Windows 11, this is great news, as it simplifies the development process.
How to get started using the Windows App SDK in existing projects
If you already have a desktop application in C# or C++, you can easily add the SDK using NuGet . Here are the basic steps:
- Open your project in Visual Studio (works on both 2019 and 2022 versions).
- Make sure you use the PackageReference format for NuGet management.
- From Solution Explorer, right-click on the project and select “Manage NuGet Packages.”
- Activate the “Include preview” option and search for the package Microsoft.WindowsAppSDK. For older versions (0.8), you should look for Microsoft.ProjectReunion.
- Click Install in the right panel to add the SDK to your project.
Note: If your project is not packaged (for example, it doesn't use MSIX), you'll need to manually load the Windows Apps SDK runtime to access its APIs. To do this, you'll need to use the boot API or properly configure the runtime environment. If you need help disabling SmartScreen in Windows 10 and 11, you can search for additional information.
Additional requirements in C++
If you're working with C++ and need to access Windows Runtime APIs, you need to enable C++/WinRT support. This is done by installing the Microsoft.Windows.CppWinRT package from NuGet. Without this reference, Visual Studio won't find the necessary headers.
Ways to deploy an application with the Windows App SDK
When it comes to distributing your app, there are two main strategies:
1. Framework dependent
In this case, the Windows App SDK runtime environment is installed separately or as part of the installer. This option is the default and has several advantages:
- Small size- Only your app is packaged, not the full SDK.
- Repairability: SDK maintenance updates are applied automatically without any intervention from you.
But there are also limitations:
- Additional dependencies: You need the SDK environment to be present on the target system.
- Risk of unintentional uninstallation- If the SDK is used by multiple apps, uninstalling one could affect the others.
2. Independent
This implementation type, introduced starting with SDK version 1.1 Preview, allows you to package all necessary SDK dependencies with your application. It has the following features:
- Greater control over the SDK version: : you decide which version you use.
- Isolation: Applications do not affect each other if they use different versions.
- Xcopy type deployment: You can distribute the app by copying the binaries, without the need for complex installers.
Of course, there are also drawbacks:
- Heavier downloads: : Size increases when including the full SDK.
- Greater use of resources: By not sharing code with other processes, more memory is consumed and loading is slower.
- It is not automatically admissible- If an SDK update is released, you'll need to integrate it manually by creating a new version of your app.
What types of apps are supported?
The Windows App SDK is designed to work with various types of traditional desktop applications. This includes:
- Win32 Desktop Applications: that use technologies such as pure C++ or MFC.
- Applications in .NET: Using WPF, Windows Forms and other frameworks that can coexist with WinUI or use it in island mode.
- Hybrid applications: that mix modern interface elements with legacy logic.
Support is quite broad, precisely because its purpose is to modernize without imposing restrictions on how the application is internally structured.
Windows App SDK version chain and update channels
The SDK follows a channel-based release strategy, allowing you to choose between different options for your projects. These channels include:
- Stable: for production, guarantees stability and support.
- Preview: includes new features not yet validated for critical environments.
- Experimental: Contains early-stage features, ideal for testing and innovation.
Open collaboration and source code
Microsoft has developed the SDK as an open-source project . You can find it in its official GitHub repository , where you'll also find much more technical documentation, roadmaps, and guides for contributing.
If you're a developer and want to participate, you can ask questions, report bugs, or even propose ideas directly to the maintenance team. This transparency helps the SDK evolve based on the real needs of the ecosystem.
The Windows App SDK represents a step toward a more unified development platform for Windows, bringing modern technologies to all types of desktop applications. With its decoupled approach and constant updates, it has become one of the most relevant tools for Windows developers today. Share this guide and help other users learn about this tool.