Microsoft Word DOcument Properties

I am currently building a customised version of the Find All Files Dialog Box - (with help from Paul Lewis - thanks Paul ).
Does anyone know how the properties of a word document are stored - ie. are they the first x number of bytes . I would like to be able to search the documents based on properties a la the advanced find dialog box in word itself.
Any help on the generalities of how word stores its properties is equally as welcome as hard code for doing this.
Cheers.

I am looking for a similar piece of information and funnily enough my search found your question which mentioned my name :) woohoo

So if you found a solution please let me know as I am still looking for something "easy" to determine whether a file with an arbitary name is either:
Microsoft Word
Microsoft Excel
Microsoft Powerpoint

I'm not even worried about the version at present.

I have this link for Word which is probably the only way to go unless someone has a simpler solution...

http://www.redbrick.dcu.ie/~bob/Tech/wword8.html

Regards
Paul Lewis
(long time no post I know)