The DefaultConnectionString value is a string variant containing the default connection string for the site.
A connection string is a text string describing properties of a database connection as a series of argument = value statements separated by semicolons. The connection string usually includes all the information needed to make a connection, including user name and password.
When a Commerce Server site requires more than one connection, additional connection strings are saved in the connection string map.
Invoked from ASP as:
Response.Write MSCSSite.DefaultConnectionString