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From: david.goldberg6@verizon.net (Dave Goldberg)
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Subject: Re: reply hook?
Date: Sat, 01 Dec 2012 14:23:11 -0500
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> Hello
> I would like to execute a couple of function when replying.
> I have not found a relevant hook so I am using defadvice  
> which is not good for debugging.

In gnus-message-setup-hook you can check for the variable gnus-article-reply.  I use this to ensure I am sending encrypted replies to encrypted messages:

(add-hook 'gnus-message-setup-hook
		 (lambda ()
		   (cond ((and gnus-article-reply
			       (message-with-reply-buffer
				(re-search-forward
			 "^Content-Type.*application/\\(x-\\)?pkcs7-mime"
				 nil t)))
			  (condition-case nil
			      (mml-secure-message-encrypt-smime)
			    (error
			     (message "One or more recipients do not have certs")))))))



-- 
Dave Goldberg
david.goldberg6@verizon.net