Syntax Highlighter for Microsoft Word and Microsoft PowerPoint (2010 and 2013 are tested).
The goal of this project is to build a syntax highlighter inside the Microsoft Office application suite. The base of this implementation is to use an existing syntax highlighter (GeSHi [php]) to process the syntax highlighting. Current version of this add in for Microsoft Word and Microsoft PowerPoint communicate over the standard input and output stream with the GeSHi library.
For more information see (german): http://bauer-sw.de/syntax-highlighter/