Using ms devenv with multiple languages

Hello,

There are several extensions for visual studio that enable the environment to behave in a special way for file types different from the original ones that it supports (cpp, bas, cs ... etc).

For example DX SDK makes this for .fx files (vs 2003 and 2005) and SapphireSteel for .rb files (vs 2005 only)

Is there any documentation of how to make it support any other file format? I need support for the editor only - syntax highlighting and nice tabbing. (both DX SDK and SapphireSteel have some other features like debugging and special run commands, which I don't need)

I suppose, an vs extension needs to be made, and whereas I do have an idea of how to make debugging and run of my special files, I don't know how to make the editor support them (no manual for that, I guess).

So can you point me to some documentation on that? Or if anyone has fought with editor support for lua, ruby, and python with vs2003 I'd be pleased to hear from him :)

Thanks for any help