Visual C++ Component Extensions is a set of high-level language extensions for C++ to work with the Universal Windows Platform (UWP) and the Windows Runtime (WinRT). Use this tag for questions concerning C++/CX and the Windows Runtime or the Universal Windows Platform. C++/CX with WinRT is not C++/CLI with .NET though there is syntax overlap between the two. Specifying the version of Visual Studio and build target version can be helpful.