Hello

I would like detec when the player pick up a specific ammo. But we can't attach script to ammo for use OnContainerChanged()
It's a way for detect when player take it?

Create a quest with an alias that points at the player. Add a script to the alias and you will get all the players events. OnItemAdded is probably the event you want. Check if the item is ammo:

if (akItemRef As Ammo)
; Do something...
endif

Make an alias and fill it with PlayerRef. Then add the following code in the script section

Scriptname myAmmoAddedScript extends ReferenceAliasAmmo Property myAmmo  autoEvent OnItemAdded()   If akBaseItem == myAmmo.GetBaseObject()      ; do stuff   EndIfEndEventEvent OnItemRemoved()   If akBaseItem == myAmmo.GetBaseObject()      ; do stuff   EndIfEndEvent

EDIT: Ninja'd

- Hypno

I never use Alias, how we creat it and link it with Quest?

Look here

http://www.creationkit.com/Quest_Alias_Tab

http://www.creationkit.com/Category:Radiant_Story

Open up your quest, click on the "quest alias" tab at the top. Right-click in the list area and select "new reference alias". Give it a name then under fill type tick "unique actor" then fill it with the player reference (cell = (any), actor = player). Then add your papyrus script in the script section and your done. If the window is too big so you cannot see the "ok" button, just click on the name text box, hold shift and hit tab twice, then press enter

- Hypno

It is possible to applied an alias on all actor?

If i want detect when an actor is hit by this ammo, and using OnHit Event, it's possible?

You might find the approach discussed in http://www.gamesas.com/topic/1349649-dynamically-attaching-scripts-to-actors-near-the-player/ useful for that.

Cipscis