Re: [h-e-w] Converting cygwin path to windows path

[Richard M. Heiberger]

The way I solve this problem is by localizing the relevant variable.
Here is an example to open windows explorer from within dired.  I use this
to copy an entire directory tree with a single drag and drop in explorer.
The critical piece is in dos-canonical-name

(defun explorer-dired-find-file ()
  "In dired, run the MS Windows Explorer on this file."
  (interactive)
  ;; dired-get-filename is defined in dired.el
  (w32-shell-execute nil "explorer" (concat "/e," (dos-canonical-name 
(file-name-directory (w32-short-file-name (dired-get-filename)))))))
(define-key dired-mode-map "\C-c\C-e" 'explorer-dired-find-file)

(defun dos-canonical-name (filename)
"Canonicalize filename forcing `\\' as directory-sep-char."
  (let ((directory-sep-char ?\ ))
    (expand-file-name filename)))