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From: david.goldberg6@verizon.net (Dave Goldberg)
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Subject: Re: couple of questions about api
Date: Sun, 25 Nov 2012 21:06:11 -0500
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> I found the function gnus-fetch-field which works fine in Article
> buffer, but not in Summary buffer. See code

> (global-set-key (kbd "\C-xpg") 'get-message-id)

> (defun get-message-id ()
>   (car (nthcdr 1 (mail-extract-address-components
> 		  (gnus-fetch-field "message-id")))))


> What do I have to call to get message-id from mail header from Summary
> buffer?

Perhaps there's something that feels cleaner but I've always used something like 

(save-excursion (set-buffer gnus-article-buffer) ...)

> And how to make it work with process markers? I'd like to mark some mail
> and get message-id one by one.

See the function gnus-summary-work-articles


-- 
Dave Goldberg
david.goldberg6@verizon.net