For unix it's `user-emacs-directory` but on Windows it's trickier: http://emacswiki.org/emacs/DotEmacsDotD

I can't vouch that's an up-to-date article though.

-Steven


On Wed, Apr 3, 2013 at 7:01 PM, Joe Riel <joer@san.rr.com> wrote:
Is there way that specifies the path to the .emacs.d
directory that works on Linux, Windows, and Mac?
Currently I use

  (format "%s/.emacs.d" (getenv "HOME"))

However, I doubt that is necessarily correct on Windows.


--
Joe Riel