Using Enterprise Library for another website on same system to build Data Access Layer

In my system, the data access layer of one of the website is build using the enterprise library. Now I am developing another [different] website. How can I use the enterprise library to create the 开发者_如何转开发data access layer?

I am very beginner to Enterprise Library?

How can I configure it for my website? Should I have to include the DLL? How it will take the connection string from the Web.Config file?

Please guide me.

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Start with Ch.1 and 2 of the Enterprise Library Developer's Guide.