Refering active web page

[arachaz]

I created an ie browser object with php called $b and I want this object to refer to the current active web page displayed by Internet explorer. How to do this with php ? The web page is an asp page generated by a server so I don't know the url. I have only access to the dispayed page on window.(windows xp)

<?php
//make an object:
$b = new COM("InternetExplorer.Application");

//navigate to current active page
$b->visible = 1;
$b->navigate(???);
....

Thanks

Arachaz