HLSL Tools is a Visual Studio extension - for VS2013 and VS2015, Community Edition upwards - that provides enhanced support for editing High Level Shading Language (HLSL) files.
You can install HLSL Tools from within Visual Studio (Tools > Extensions and Updates, search for “HLSL Tools”) or download it from the Visual Studio Gallery and here’s the GitHub repo
http://timjones.tw/blog/archive/2015/10/06/introducing-hlsl-tools-for-visual-studio