Please be specific: What does "reading" a word document exactly mean? Do you want to read it with your eyes or import it? And in the latter case, as binary stream or as text? If you are talking about a text, how could the embedding of a watermark be possible without changing it substantially?
Currently a meaningful answer is not possible, because the question is unclear and the part, which I can understand, is not possible to be solved. While the term "urgent" is counterproductive, an exact description of the problem would be useful.