add_filter??

[eru321]

if you want to create a plugin, read here: http://get-simple.info/wiki/plugins:creation

if you want to create a component and add that to your content, read here: http://get-simple.info/wiki/components?s[]=component

that's in the WIKI

Thanks for the answer. I'll try to be more clear.
For example, the mp3 plugin.
I write (% mysong.mp3 %) in the page where i want to insert the player.

I would do the same thing with my plugin.