do you know the occasions(hooks) in joomla 1.7 to include plug ins ?

I've been developing some joomla plug ins, I must know the number of occasions(like onContentBeforeDisplay) we've in joomla to incorporate wordpress plugin codes.

Well, I can not attest to how comprehensive or up-to-date this really is, but this is actually the connect to Joomla's wiki documentation on plugin events

Hope that can help. Possibly the best way forward would be to look inside the /plug ins/ folder and it is sub-folders. You will find (or was once??) example.php plug ins contained therein.