Welcome to Windows app development. This guide will take you through the steps needed to begin creating apps using the latest Windows development frameworks: the Windows App SDK and WinUI. It will also point you to resources that will help you learn more about Windows development. If you are already comfortable developing apps for Windows, but want to know more about the latest tools, please see Develop Windows desktop apps.

You'll use Visual Studio, Microsoft's comprehensive integrated development environment (IDE), to create your WinUI app. It's the preferred development tool of many Windows developers and it will help you write, debug, and deploy your apps. The project templates in Visual Studio will quickly get you started with projects for Windows and many other platforms.

Use this link to download and install the latest Visual Studio. The installer will walk you through the steps, but if you find you need detailed instructions, see Install Visual Studio.

[!div class="button"] Download Visual Studio

The free Visual Studio Community Edition includes everything you need to create your apps. If you're working with a development team or enterprise, you might need Visual Studio Professional or Visual Studio Enterprise. See What is Visual Studio? for more info.

While installing Visual Studio, you need to install the workloads and components required for developing with WinUI and the Windows App SDK. After installation, you can open the Visual Studio Installer app and select Modify to add workloads and components.

On the Workloads tab of the Visual Studio Installer app, select the following workloads and components:

• For C# app development using the Windows App SDK, select Windows application development.

:::image type="content" source="images/hello-world/vs-workload-winui.png" alt-text="A screenshot of the Visual Studio installer UI with the Windows application development workload selected.":::

• For C++ app development using the Windows App SDK, select Windows application development.
  • Then in the Installation details pane, under the Windows application development node, select C++ WinUI app development tools. (This will also select any additional required components.)

:::image type="content" source="images/hello-world/vs-workload-winui-cpp.png" alt-text="A screenshot of the Visual Studio installer UI with the C++ WinUI app development tools selected.":::

• For C# app development using the Windows App SDK, select .NET Desktop Development.
  • Then in the Installation details pane of the installation dialog box, select Windows App SDK C# Templates (near the bottom of the list).
• For C++ app development using the Windows App SDK, select Desktop development with C++
  • Then in the Installation details pane of the installation dialog box, select Windows App SDK C++ Templates (at the bottom of the list).
  • On the Individual components tab of the installation dialog box, in the SDKs, libraries, and frameworks section, make sure the latest Windows SDK is selected. It will look like Windows 11 SDK (10.0.22621.0). Type "Windows SDK" into the search box to make it easier to find.

Windows has a special mode for developers that adjusts security settings in order to let you run the apps you're working on. You'll need to enable Developer Mode before you can build, deploy, and test your app using Visual Studio.

To enable Developer Mode:

• Open Windows Settings and navigate to the System > For developers page.
• Toggle the Developer Mode switch to On and confirm your choice in the confirmation dialog.

For more information about Developer Mode, see Enable your device for development.

Visual Studio project templates include all the files you need to quickly create your app. In fact, after you create your project from a WinUI app template, you'll already have an app that you can run, and then add your code to.

To create a new project using the WinUI C# Blank App project template:

1. Open Visual Studio and select Create a new project from the launch page. (If Visual Studio is already open to the editor, select File > New > Project): :::image type="content" source="images/hello-world/start-project.png" alt-text="Create a new project":::

2. Search for WinUI and select the Blank App, Packaged (WinUI 3 in Desktop) C# project template, then click Next: :::image type="content" source="images/hello-world/create-project.png" alt-text="Blank, packaged WinUI 3 C# desktop app":::

3. Specify a project name, then click Create. You can optionally specify a solution name and directory, or leave the defaults. In this image, the Hello World project belongs to a Hello World solution, which will live in C:\Projects\: :::image type="content" source="images/hello-world/configure-project.png" alt-text="Specify project details":::

4. Click the Debug "Start" button to build and run your project:
   :::image type="content" source="images/hello-world/start-click.png" alt-text="Build and run your project":::
   Your Hello World project will build, be deployed to your local machine, and run in debug mode:
   :::image type="content" source="images/hello-world/click-me.png" alt-text="Hello World project built and running":::

5. To stop debugging, close the app window, or click the debug "Stop" button in Visual Studio.

The Windows App SDK (and WinUI, which is part of it) is distributed as a NuGet package. This means updates can be released out-of-sync with Windows and Visual Studio. As a result, the Visual Studio template you used to create your project might not reference the latest Windows App SDK NuGet package. To ensure you have the latest features and fixes, you should update your NuGet packages every time you create a new project in Visual Studio.

To update the Windows App SDK NuGet package for your project:

• In Visual Studio, with your project loaded, select Tools > NuGet Package Manager > Manage NuGet Packages for Solution....
• If an update is available, it will appear on the Updates page. Check the box next to the listed update. (To include prerelease updates, check the "Include prerelease" option. To learn more about what's included in an update, see the release notes.)
• Click the Update button, then click Apply in the Preview changes dialog, then accept the license terms to finish installing the update.

:::image type="content" source="images/hello-world/nuget-update.png" alt-text="A screenshot of the NuGet package manager in Visual Studio showing a Windows App SDK package update.":::

Now your project is using the latest WinUI features that are available, and it's ready for you to make it your own.

• Complete a tutorial to add more code to your Hello World app.
• To get an idea of what WinUI has to offer, check out the WinUI Gallery app. [!INCLUDE winui-3-gallery]
• Learn more about WinUI fundamentals.
• Explore Fluent Design principles.
• Find samples and tools to help you develop apps more efficiently.