Saving a word document(2000 to 2010) to xml

[C# Programming]

Hi.
How can i save a word document to xml format for parsing later with xslt.

I noticed that word 2007-2010 document are constructed with the openxml format so i can use openxml tools to save it.
But word 2000-2003 seems to be in binary format.

Is there a tool that i can use for this mission?

Thanks