Has anyone used the HTML object library before ?

If so , please could you reply as I need a spot of help. Basically, I have dll that runs on the clients machine that runs in parallel with the web site. I can call the dll fine in vbscript and what I want to do is pass in the document object of the page that they are in so that I can fire off a script from that page. sound mad but there is reason behind my madness. I've managed to just about crack the passing the object in, but as for firing off a script, I cannot find anything.

Any help will be most appreciated :)

Thanks

Ian