In order to invoke screen-scraper from ASP, screen-scraper needs to be running in server mode. If you'd like a refresher on how to start up screen-scraper in server mode go ahead and follow that link, then come back here.
Right-click and download the shopping.asp file, then save it to a directory where it will be web-accessible (i.e., within your IIS web dir).
Open up your web browser and go to the URL corresponding to the shopping.asp file (e.g, "http://localhost/screen-scraper/shopping.asp"). You'll see a simple search form. Type in a product keyword, such as bug, then hit the Go button. If all goes well the page will take a little while to load (it's waiting as screen-scraper extracts the data), then it will output the corresponding products.
If that didn't go quite as you expected here are some things to check:
Assuming the test worked, fire up your favorite ASP editor and open the shopping.asp file in it. The file is pretty heavily commented, so hopefully it makes sense what's going on. If not, try reviewing our COM documentation or posting to our forum.
When you invoke screen-scraper as a server it creates log files corresponding to each run of your scraping sessions in its log folder. Take a look in that folder for your Shopping Site log and take a look through it. It should look similar to what you see when you run scraping sessions in the workbench.