Rounded corners

What’s cool for developers

Windows 11 brings new SDKs and a beautiful UI for new and existing apps.

WinUI

Learn how to use WinUI controls in your new apps, or update your existing MFC, WinForms and WPF projects.

LEARN MORE

WinRT API reference

Check out the hundreds of new APIs covering automation, app resource management, inking, composition and more.

LEARN MORE

Win32 API reference

Read through the new APIs that cover text rendering, camera support, audio processing and more.

LEARN MORE
Screen shot of rounded corners on a dialog box

Rounded Corners

Rounded corners are the most immediately noticeable feature of Windows 11 Geometry. Learn how to round your Win32 app's main window corners if the system doesn’t round them automatically.

ROUND UP
Screenshot of SDK in Visual Studio

Windows App SDK

The Windows App SDK — the new name for Project Reunion and WinUI 3 — brings a unified set of APIs and tools for developing desktop apps to Windows 11 and Windows 10.Choose your UI, language, and technology then share your apps with millions.

LEARN MORE

Windows App SDK Samples

This repository contains a growing number of samples for features shipping in the Windows App SDK.

LEARN MORE

Line of Business Sample

A sample app showcasing features useful for enterprise developers, updated to use WinUI.

LEARN MORE CASE STUDY

WinUI Controls Gallery

The definitive sample highlighting WinUI user interface controls.

LEARN MORE
Screen shot of new UI

Windows Design

Windows 11 has a focus on geometry, color, layering, typography and materials that brings a fresh new look for you to leverage micro-interactions and window snapping experiences, whether creating new apps or revitalize your existing apps.

WINDOWS 11 DESIGN PRINCIPLES
Xbox game character

GameStack

Use Game Stack to find the tools and services used by PC game developers around the world. The new Game Development Kit (GDK) offers access to the SDK with tools, libraries, and documentation needed to build amazing games for Windows.

FIND OUT MORE
Screenshot of new Microsoft Store

Microsoft Store

Distribute your work to an audience of millions! Redesigned for developers to have new channels for discovery, including integration with your website and open support for more kinds of apps to run on Windows.

DISCOVER NOW

Open for all!

Distribute your desktop app via the Store, no matter what app framework or packaging tool you use: Win32, .NET, Java, Electron, or MSIX.

LEARN MORE

PWA

Build Progressive Web Apps with PWABuilder 3, debug with PWA support in the Microsoft Edge dev tools, and publish your PWA in the Store, including access to new commerce tools and capabilities!

LEARN MORE

Sign up now!

Join the waitlist to get your apps in the Store when it opens for business.

SIGN UP
Background color

Become an Insider!

Get early access to Windows 11 and the development tools you need to update your existing app, or create brand new ones.

SIGN UP