Vista - ASP.NET with DirectX

Hello,

I am not sure which group to put this in, but I am new to asp...
already familiar with C#. I am trying to create a web app with
directx. I have had trouble that I am unable to acquire a window
handle in a web application. So should I create it as a web service?
What is the difference between a web app and a web service?

Thanks for your responses.

It happens that bushman formulated :What are you trying to do?
A web-application is a client-server application. The code-behind runs
on the server, while the pages are displayed client-side. So getting a
window handle for a client-side window is not possible from the
server-side codebehind.

Hans Kesting

bushman brought next idea :A web-app generates HTML pages, to be viewed by a human through a
browser.
A web service is meant to be accessed by some other application. It
usually returns XML.

Hans Kesting