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Microsoft open sources the Windows Calculator app on GitHub

The Windows Calculator source code is now available on GitHub. (Source: Microsoft)
The Windows Calculator source code is now available on GitHub. (Source: Microsoft)
Microsoft is open sourcing the code of Windows Calculator on GitHub in a bid to encourage developers learn more about Microsoft technologies by reviewing the code used in the app. Developers can now use Windows Calculator functionality in their own apps and participate in code review and feedback via GitHub. Microsoft will continue to finally test and flight the app in Windows builds as usual.

Microsoft has announced that the Windows Calculator app is being open sourced on GitHub under the MIT License. The GitHub project hosts the source code, build system, unit tests, and the product roadmap, which should give developers an idea about how the app works.

The Windows Calculator is written in C++ and offers standard, scientific, programmer, and converter functionality. To run and test the code yourself, you need Windows 10 version 1803 or later, any SKU of the latest version of Visual Studio, UWP development workload, C++ UWP tools, Windows 10 SDK, and the XAML Styler extension for Visual Studio.

Apart from open sourcing the development of Windows Calculator on GitHub, the team hopes to add more Fluent Design elements, improve testing and diagnostics of the app, add the ability to pin the app on top of other windows, provide additional customization options, and more features this year based on user and developer feedback.

Developers can also learn about Microsoft technologies such as UWP, XAML, Azure Pipelines, and Fluent Design by reviewing the code posted on GitHub. To make it easier for developers to implement Fluent Design elements in their own apps, Microsoft will contribute custom controls and API extensions that are used in the app to projects such as the Windows Community Toolkit and the Windows UI Library.

Microsoft hopes to solicit new ideas and feedback to improve the functionality of Windows Calculator via this move. With the code now open source, developers can integrate or reuse Windows Calculator functionality into their own applications or directly submit code that will be part of the Calculator app in future Windows builds. Microsoft will continue to test and flight the app to Insiders just like any other inbox app.


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Vaidyanathan Subramaniam
Vaidyanathan Subramaniam - Managing Editor - 1585 articles published on Notebookcheck since 2012
Though a cell and molecular biologist by training, I have been drawn towards computers from a very young age ever since I got my first PC in 1998. My passion for technology grew quite exponentially with the times, and it has been an incredible experience from being a much solicited source for tech advice and troubleshooting among family and friends to joining Notebookcheck in 2017 as a professional tech journalist. Now, I am a Lead Editor at Notebookcheck covering news and reviews encompassing a wide gamut of the technology landscape for Indian and global audiences. When I am not hunting for the next big story or taking complex measurements for reviews, you can find me unwinding to a nice read, listening to some soulful music, or trying out a new game.
contact me via: @Geeky_Vaidy
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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2019 03 > Microsoft open sources the Windows Calculator app on GitHub
Vaidyanathan Subramaniam, 2019-03- 9 (Update: 2019-03- 9)