Project Reunion is an evolution of the Windows developer platform that will make it more compatible, agile, modern and open.
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# Project Reunion
What is Project Reunion?
Project Reunion is our vision for unifying and evolving the Windows developer platform to make it easier to build great apps that work across all the Windows 10 versions and devices people use.
Project Reunion makes it easier to build a great Windows app by providing a unified platform for new and existing Win32 and UWP apps. It will unify access to existing Win32 and UWP APIs and make them available decoupled from the OS, via tools like NuGet.
Project Reunion will help you update and modernize your existing apps with the latest functionality, whether they’re C++, .NET (including WPF, Windows Forms, and UWP) or React Native. As we decouple existing APIs and add new APIs, we are also doing the work to polyfill, as needed, so the APIs work down-level across supported versions of Windows.
How can I use Project Reunion?
WinUI 3 Preview 1 is one of the first components in the Project Reunion journey: it’s the modern native UI framework for Windows, now available to all Windows app developers across both UWP and Desktop apps. Using WinUI you will be able to create new apps with modern UI that adapts and scales across devices, or incrementally modernize the UI of existing desktop apps including C++, WPF and WinForms.
Project Reunion Principles
Project Reunion works in all your apps - Win32, Packaged, and UWP - and across many versions of Windows.
Project Reunion ships out of band with OS releases, with regular previews. You get to incrementally adopt Project Reunion components for your existing apps and middleware libraries using NuGet.
We’re committing to engineering Project Reunion in the open on GitHub, so you have a more direct say in how the platform evolves and can even help out.
We want to hear from you!
File a new issue! Tell us what problem you’re trying to solve, how you’ve tried to solve it so far, and what would be the ideal solution for your app. Bonus points if there’s a gist or existing repo we can look at with you.
Start a discussion Discussions can be about any topics or ideas related to Project Reunion. For example, you might start a Discussion issue to see if others are interested in a cool new idea you’ve been thinking about that isn’t quite ready to be filed as a more formal Feature Proposal.
Make a feature proposal What components do you want to see in Project Reunion? For example you can propose a new API on an existing type, or an idea for a new API. It’s fine if you don’t have all the details: you can start with a summary and rationale.
Over time, we will add Project Reunion code and samples into this repo and provide code contribution/developer guidelines.
Read more about the contribution guide here.
Project Reunion aims to work on supported versions of Windows. We’ll use techniques like ‘polyfills’ and custom implementations to do the heavy lifting for you and make sure your app works across Windows versions and devices.
- More details about Project Reunion - More on what the project is and how we’re approaching the work.
- Roadmap - Where we’re going. We’re following this roadmap that gets us to building a first version of Project Reunion exploring some basic common features. You can help by filing issues for features you’d like to see!
- Contributor guide - How to contribute to Project Reunion.
- FAQ - Frequently asked questions about Project Reunion.
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