Re: where is a function defined

       I need to find the lisp code for a function, not only the
   description. Thanks for the response anyway.

describe-function shows a "link" to the elisp code for a function.
For example, this is the docstring for describe-function, the link to
the elisp code be be retrived by pressing the `help-fns' link thing.

describe-function is an interactive compiled Lisp function in `help-fns'.
It is bound to C-h f, <menu-bar> <help-menu> <describe> <describe-function>.
(describe-function FUNCTION)

Display the full documentation of FUNCTION (a symbol).