Install AUCTEX

These are the steps to install AUCTEX in Windows.

1. Install MikTeX.
2. Install Ghostscript and GSview for Windows.
3. Download and install the precompiled bundle of AUCTEX.
4. Configure path.
   • Add to system PATH the directory which contains gsview32c.exe for enabling latex-preview.
     This directory looks like " C:\Program Files\gs\gs8.60\bin ".
   • Add to system PATH the directory which contains gsview32.exe for using viewing output in PDF mode.
     If you prefer to view the output using Acrobat Reader, add the corresponding directory to PATH, and customize the variable TeX-output-view-style accordingly, either in .emacs or inside Emacs.
   • Add a user varible HOME, which value is your home directory for Emacs.
5. Configure Emacs. Create a file .emacs with the following contents:
   

   ;; the wrapping up of the two loads make sure
   ;; auctex is loaded only when editing tex files.
   (eval-after-load "tex-mode" '(progn
   (load "auctex.el" nil nil t)
   (load "preview-latex.el" nil nil t)))

   ;; ACUTeX replaces latex-mode-hook with LaTeX-mode-hook
   (add-hook 'LaTeX-mode-hook
   (lambda ()
   (setq TeX-auto-save t)
   (setq TeX-parse-self t)
   ;; (setq-default TeX-master nil)
   (reftex-mode t)
   (TeX-fold-mode t)))

6. Customize varibles in Emacs (M-x customize-variable). The changes will be automatically saved into your .emacs file.
   • TeX-output-view-style
     You can also reach this option from the Menu: LaTeX -> Customize AUCTeX -> Browse Options -> TeX Command -> TeX Output View Style.
     Replace all occurences of xdvi by " yap " (for viewing dvi files), and all occurences of xpdf by " gsview32 " (for viewing pdf files). If you have other preferences, make sure their paths are included in the system variable PATH.
   • display-mm-dimensions-alist
     You can also reach this option from the Menu: Options -> Customize Emacs -> Top-level Customization Group -> Environment -> Frames -> Display Mm Dimensions Alist.
     If the preview in Emacs is too small, you may need to customize this variable. The values set on my computer are Width: 320, Height: 200.
7. Problems you might run into:
   • If you get the following error when running preview:
     " LaTeX: preview-image-type setting 'png unsupported by this Emacs "
     add the line
     (setq preview-image-type 'pnm)
     to the end of the file preview-latex.el.
   • In the file .emacs, uncommenting the line (removing leading semicolons)
     ;; (setq-default TeX-master nil)
     allows Emacs to ask for the master file when creating a new tex file. However, when you preview a tex file for the first time, if you click the " preview on/off at point " button, the preivew may set the master file to " _region_.tex ", which will affect the afterward compiling and viewing. To solve this problem, choose "Preview for document " when previewing the file for the first time (or you may simply choose not to add the above line in .emacs).