find-file-binary

Currently, "hexl-find-file" does not work on WinNT. "hexl.el" contains the following: (defun hexl-find-file (filename) "Edit file FILENAME in hexl-mode. Switch to a buffer visiting file FILENAME, creating one in none exists." (interactive "fFilename: ") (if (or (eq system-type 'ms-dos) (eq system-type 'windows-nt)) (find-file-binary filename) (find-file filename)) (if (not (eq major-mode 'hexl-mode)) (hexl-mode))) However, the function "find-file-binary", AFAICT, is not defined anywhere - not in any of the package lisp, or the XEmacs base source, which I have been furiously grepping through for the last half-hour. Of course, I'm probably overlooking something obvious. Where is this function supposed to be defined?