Which program in Visual Studio lets me look into DLLs to see its API?

Question

See the question. I want to see the methods and classes offered by a DLLs library.

Answer 1

For those coming from the old Visual Studio 6.0 days:

Dependency Walker is a nice free tool, that was formerly part of Visual Studio.

http://www.dependencywalker.com/

I like it still. Here is a screen shot: