Web spider to crawl specific site and cultivate Ad data

**A)** I need a program with a web interface, if possible coded using Microsoft Technologies (in .Net?) that crawls (online tracking spider) through specified websites/webpage and extracts: ? a copy of the website/webpage ? Banner Ads ? Google Ads Goal is to track display Ads in a given website. **B)** Also, I need an interface to enter multiple "search keywords" and then extract: ? Google Ads (from Google search page) ? Yahoo Ads (from Yahoo search page) ? Microsoft Ads (from Microsoft search page) A nice to have feature is also to return the top five search results per keyword in a search engine (websites) as well Goal is to track the search engine Ads displayed against a respective "search keywords" Please let me know, what is possible. Open to suggestions.