Universal Windows Platform apps: Difference between revisions

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[[File:Wikipedia App snapped to Windows 8 desktop.png|thumb|Left: A traditional desktop app without contents; it is showing 60 [[Widget (GUI)|graphical widgets]], and a thick border.<br/>Right: Metro-style app; entirely composed of contents]]

'''Universal Windows Platform''' ('''UWP''') '''apps'''<ref>{{citation|title=Microsoft is trying to change Windows software forever — here's why it'll be a tough fight|first=Matt|last=Weinberger|date=March 17, 2016|url=http://www.businessinsider.com/microsoft-universal-windows-platform-explained|access-date=June 27, 2016}}</ref> (formerly named '''Windows Store apps''', '''Metro-style apps''' and '''Modern apps''')<ref name=Harrel>{{citation|title=Metro, Modern, Now Universal? Microsoft Can't Make Up Its Mind!|first=William|last=Harrel|date=April 10, 2015|work=Digital Trends|url=http://www.digitaltrends.com/computing/microsoft-universal-apps/|access-date=June 27, 2016}}</ref> are [[Application software|applications]] that can be used across all compatible [[Microsoft Windows]] devices. They are primarily purchased and downloaded via the [[Microsoft Store]], Microsoft's digital application storefront.<ref>{{citation|title=Microsoft's Windows app strategy comes under fire: 'The most aggressive move Microsoft has ever made'|first=Matt|last=Weinberger|date=March 4, 2016|work=Business Insider|url=http://www.businessinsider.com/epic-ceo-tim-sweeney-slams-windows-10-2016-3|access-date=June 27, 2016}}</ref> UWP wasstopped deprecatedadding new features in October 2021.,<ref>https://www.developer-tech.com/news/microsoft-universal-windows-platform-finally-being-sunset/</ref> but toolchain updates continue to be made.<ref>https://devblogs.microsoft.com/ifdef-windows/preview-uwp-support-for-dotnet-9-native-aot/</ref>

==Nomenclature==

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===Windows Runtime===

Traditionally, Windows software is developed using the [[Windows API]]. Software has access to the Windows [[API]] with no arbitrary restrictions. Developers were free to choose their own [[programming language]] and [[development tool]]s. Metro-style apps can only be developed using [[Windows Runtime]] (WinRT). (Note that not every app using WinRT is a Metro-style app.) A limited subset of WinRT is also available for also conventional desktop apps.<ref>{{cite web|title=Windows Runtime 8.x APIs for desktop apps|url=https://learn.microsoft.com/en-us/windows/win32/apiindex/winrt-apis-for-desktop-apps|website=Windows App Development|via=[[Microsoft Learn]]|publisher=[[Microsoft]]|access-date=31 July 2015}}</ref> Calling a forbidden API disqualifies the app from appearing on Windows Store.

Metro-style apps can only be developed using Microsoft's own development tools. According to Allen Bauer, Chief Scientist of [[Embarcadero Technologies]], there are APIs that every computer program must call but Microsoft has forbidden them, except when the call comes from Microsoft's own [[Visual C++]] runtime.<ref>{{cite web|last=Grange|first=Eric|title=Why no native WinRT support in Delphi XE3?|url=http://www.delphitools.info/2012/08/23/why-no-native-winrt-support-in-delphi-xe3/|work=DelphiTools|access-date=13 January 2014|date=23 August 2012}}</ref><ref>{{cite web|last=Anderson|first=Tim|title=Third-party compilers locked out of Windows Runtime development|url=http://www.itwriting.com/blog/6347-third-party-compilers-locked-out-of-windows-runtime-development.html|work=Tim Anderson's ITWriting|access-date=13 January 2014|date=23 August 2012}}</ref><ref>{{cite web|last=Bauer|first=Allen|title=HTML5 Builder|url=https://forums.embarcadero.com/message.jspa?messageID=484319#484319|work=Embarcadero Developer Network|publisher=Embarcadero Technologies|access-date=13 January 2014|date=22 August 2012|archive-date=14 June 2020|archive-url=https://web.archive.org/web/20200614102211/https://forums.embarcadero.com/message.jspa?messageID=484319#484319|url-status=dead}}</ref>