Need help to add content to the activity stream

[Bastien]

I'd like to add content to the block Ativity stream and to the activity stream.

I searched yesterday, it doesn't seem there are hooks for activity stream.

I've looked at the activity.php and the activitystream.php but don't understand how the activity stream collects things to display in it.

I modified my forums :
- Suppliers can register on the site (entries are created in a new table)
- Suppliers can select products they sell (with this same script but the part is hidden for guests and non suppliers, in a table linked to the previous one)

this is with this file : http://lecoinduprothesiste.fr/forums/fournisseurs.php

Now, when a supplier created its account and selected its products, user can ask in a dedicated forum, a quotation for a product, and an email is automatically sent to suppliers that sell this product : http://lecoinduprothesiste.fr/forums...mande-de-devis

All this new modification works fine.

But now I'd like to add to the activity stream :
- when a supplier created its account
- when suppliers add products they sell


Could someone help me with this new part to the activity stream !

Thank you for your help