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I want an elisp script to highlight a region of text.
Upon exit, the highlighted selection should disappear when a key is pressed.
Everything I've tried results in the highlighting hanging on like the shift key is pressed. What does it need to make the selection transient? 

(defun TEST ()
  (interactive)
  (transient-mark-mode t) ;; I have this true normally anyhow
  (set-mark (point))
  (forward-char 2)
  (setq mark-active t))
(global-set-key [C-S-f2] 'TEST)
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1 Answer

up vote 2 down vote accepted

This works for me in Emacs 24:

(setq transient-mark-mode t)

(defun foo ()
  (interactive)
  (push-mark (point))
  (forward-char 2)
  (activate-mark))
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(one week later) On double-checking, it turns out that I asked the wrong question. I used the wrong terminology; "transient" means something different to what i thought... I finally resolved my issue via another related quesiton, when I realized that C-x C-e evaluating behaved differently from CUA mode, which in turn behaved differently from "non CUA" mode... Here is the link for anyone intereted: Different results when run different ways ... Thanks for the help. – Peter.O Dec 1 '11 at 13:31

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