Webtrends licence flaw

Webtrends is one good package to analyze your web applications in all sorts of scenarios. However, recently I got in trouble with their licensing policy.

In different projects, I used to generate dynamically a lot of images coming from a database, using an aspx page, something like:

genimage.aspx?id=2000 (id is the image id).

But with WebTrends this has been a huge issue recently, because their licence works by page view, and of course my neat code was just doing that, creating too much hits on an expensive license.

Thanks to HTTPHandlers, I transformed the .aspx nightmare by clean .gif and .jpg files, intercepted by the handler to get the right image from the database.

I will publish soon my version of the image handler on Developers.ie if someone is interested.

Can someone tell me what .ashx generate exactly at the client side?