Windows Software Development Kit (SDK) for Win8.1

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Windows Software Development Kit for Win8.1
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The Windows Software Development Kit (SDK) for Windows 8.1 contains headers, libraries, and tools you can use when you create apps that run on Windows operating systems. You can use the Windows SDK, along with your chosen development environment, to write Windows Store apps and desktop apps for Windows 8.1 as well as Windows 8, Windows 7, Windows Vista, Windows Server 2012, Windows Server 2008 R2, and Windows Server 2008.

The Windows SDK also includes the Windows App Certification Kit 3.3 (Windows ACK) to test your app for the Windows 7, Windows 8, Windows 8.1, and Windows 8.1 Phone certification program.

The Windows SDK no longer ships with a complete command-line build environment. You must install a compiler and build environment separately. If you require a complete development environment that includes compilers and a build environment, you can download Visual Studio 2013, which includes the appropriate components of the Windows SDK. To download the SDK and install it on another computer, click the download link and run the setup. Then in the Specify Locationdialog box, click Download the Windows Software Development Kit for installation on a separate computer.