For Microsoft, the future isn’t only about UWA (Universal
Windows App) as Win32 and Forms are also important for the
platform. During Build 2020 developer conference keynotes,
Micorosft announced that Project Reunion, which according to
the company, is an “evolution” of the Windows developer
With Project Reunion, Microsoft will reduce fragmentation
between Win32 and the Universal Windows Platform (UWP) APIs.
Microsoft’s Project Reunion will make it easier for developers
to build a Windows app based on both Win32 and UWP APIs.
Project Reunion unifies existing Win32 and UWP APIs and makes
them available via tools like NuGet, which provides a common
In simple terms, Project Reunion streamlines the development of
Win32 and UWP and the result is just “Windows apps.”
Developers can now modernize their existing apps with new APIs
of both UWP and Win32 for Windows 10. Project Reunion also
introduces backwards-compatibility for making Windows apps and
allows developers to continue supporting older versions of
Windows 10 such as version 1703.
Microsoft is also decoupling the APIs from Windows 10 updates,
which is a significant change as it allows the company to make
improvements to the app development platform without requiring
a feature update.
In addition, Project Reunion will embed Chromium-based WebView
in apps that load a webpage.
WebView 2 is the first major component of Project Reunion and
will be separate from the Windows 10 so that it can be
maintained across all platforms without requiring a feature
You will get the full functionality in all versions of Windows
10 when developers implement it into one of their apps.
Project Reunion platform (Win32 + UWP APIs) isn’t tied to the
operating system. Microsoft will continue to make improvements
to the platform without Windows 10 major updates and apps will
offer the same features set across all supported versions of