.htaccess general question 403 message

Hi Vbseo, I have a general question about .htaccess, it is not seo question much but i didn't know where to post it.

If on my site, I don't want users or search engine to view the gallery, how can I add a 403 forbidden message to the .htaccess? so when anyone visit the gallery, they would see a 403 message.

Also let say if i want only users, not guests to only access/view the gallery, how can i add this to .htaccess?

I know that this code for example will only allow members not guests to upload images

$userc = new user();
if(!$userc->check_log())
print "You need to log in.";
exit;

You can protect a directory the same way as outlined for the admincp:
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