pinentry - Impossible to disable/ignore if present?

[Jules Colding]

On Fri, 2007-04-20 at 15:06 +0200, Werner Koch wrote:
> On Fri, 20 Apr 2007 14:22, colding at omesc.com said:
> 
> > I find that pinentry unconditionally is being launched whenever I
> > attempt to encrypt or decrypt something using gpgme. 
> 
> Depends.  With gpg 1.4 you need to use --use-agent.  But if you are
> using gpg2 the gpg-agent is required and you won't see a passphrase
> callback.  That is so that we eventually can move all secret key
> processing into gpg-agent.

So even if I prevent pinentry to show up it will eventually be
impossible for me to provide my own callback function?

Will this also hold true if I use libgcrypt instead?

Thanks,
  jules