Extracting kanji from MS Word document

Is there a clever, quick way of taking a Word document and deleting all the kana so you're left with just kanji?  Thanks.
You probably could program a parser that checks character for character and filters those that are kana. It shouldn't take more than an hour to program such a thing with plain text files. Depending on the libraries of the programming language, it could take an extra hour to program it so it processes Word documents.