I am trying to add support for a different language in Visual Studio 2010. I was hoping to add custom syntax highlighting, and have some sort of basic intellisense work with it. The language I am trying to add is 4Js Genero (a newer version of Informix-4GL). I basically just need support for the `.4gl` and .`per` file extensions that are used in Genero/4GL. Does anyone know how to do this, or can point me in the right direction?