I'm using VisualAssist build 2393 on Visual Studio 2019 (16.3.9). I'd like to add support for custom extensions we use for HLSL shader files: ".mshader" and ".mshaders".
To get VA to treat the new extensions as a C++ file and provide highlighting, please follow the instructions here. There are a few extra steps that the other documentation page does not list. https://docs.wholetomato.com/default.asp?W328