Microsoft Windows SDK, and its predecessors Platform SDK, and .NET Framework SDK, are software development kits (SDKs) from Microsoft that contain documentation, header files, libraries, samples and tools required to develop applications for Microsoft Windows and .NET Framework.
Platform SDK contains compilers, tools, documentations, header files, libraries and samples needed for software development on IA-32, x64 and IA-64 CPU architectures.
It integrates with Visual Studio, so that multiple copies of the components that both have are not installed; however, there are compatibility caveats if either of the two is not from the same era.
Windows SDKs are available for free; they were once available on Microsoft Download Center but were moved to MSDN in 2012.
(Does not officially install on Windows 95) Includes ARM64 support for the Visual Studio 17.4 release The Windows SDK documentation includes manuals documenting: