There is nothing in the PHP library that could be done - you want to configure an external application (with a queue) to receive images, although you can, of course, use PHP to add elements to the queue.
There are several Windows functions in GD that take screenshots of a computer (a web server, not a client), so maybe you can write a script in PHP for this.
Edit: Thought of it: imagegrabscreen and imagegrabwindow . I'm not sure that they will do what you want (even in full screen mode, Firefox has an ablue panel at the top of the screen - not sure about other browsers). However, Pierre has something for these functions if you are interested.
I would suggest writing an application in another language (I assume .NET has something) to do this for you. Edit: This page tells you how to do this in C #
Ross Jan 14 '09 at 17:11 2009-01-14 17:11
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