I found the doxygen docs far less useful than the man page.

On Apr 23, 2008, at 10:31 PM, "Niels Provos" <provos@citi.umich.edu>  
wrote:

quoted text
> On Mon, Apr 21, 2008 at 2:05 PM, Gilles Chehade <gilles@openbsd.org>  
> wrote:
>> Yay, I too fell in love with it and it's various API's despite the  
>> lack
>> of documentation for most of them, header help understanding how  
>> things
>> work but I wasted quite some time on bufferevents ;-)
>
> The documentation has actually become much better over time:
>
> http://www.monkey.org/~provos/libevent/doxygen-1.4.3/
>
> However, I'd be happy to see any patches to improve the documentation.
>
> Thanks,
> Niels.