Syntax Highlighting

How would one go about adding syntax highlighting support for a new file type in VS.NET? It's basically C# with template support (ASP style tempates). If I can't add a new file type can you associate a file extension with another language (i.e. have the editor have .cs and .somethingelse be handled by the C# editor)? Thanks in advance.
[339 byte] By [codefund.com] at [2008-2-7]
# 1
This is a question for the VS Shell team. Try either of the following newsgroups.

<a href="news://msnews.microsoft.com/microsoft.public.vsnet.ide">news://msnews.microsoft.com/microsoft.public.vsnet.ide</a>

<a href="news://msnews.microsoft.com/microsoft.public.dotnet.languages.csharp">news://msnews.microsoft.com/microsoft.public.dotnet.languages.csharp</a>

- mike

codefund.com at 2007-9-8 > top of Msdn Tech,Windows Forms,Windows Forms Designer...