Provides several WWW Document content methods.

The following operations are supported. For a formal definition, please review the Service Description.

• Contains
  Parses and searches a WWW document using the provided URL and search text.
• ContainsLink
  Parses a WWW document and searches its contents for a given link. TargetURL is the URL you want to parse while LinkURL is the link you want to know whether or not exists there.
• Parse
  Parses a WWW document using the provided URL and returns its contents.