Object identification key

I am hoping someone can answer what I expect is a very simple question, but although I have looked for a few days I cannot find the answer by myself.
I need to get the key for a prim/s. The reason is to change the direction of particles in mid life by attracting them to a prim. Can someone tell me how to locate a prims key?

http://wiki.secondlife.com/wiki/LlGetKey





(Edited to remove an alternate method that doesn't actually work.)

Thank you very much !

I'm not sure Chosen's example works with prims/objects, because copies of objects often get assigned new keys. (rezzing something from inventory usually creates a copy, unless you're wearing it, or it's a unique item).

Have you visited the particle lab? There were a few target examples set there.

Keys of inventory's objects are null.
llGetKey must be used but you won't be able to change the direction of already emitted particles unless they are already targeting the key (that is moving).

Rusty & Simil, thanks for the correction. You're absolutely right, of course. That's what I get for posting at 5 in the morning after having been up all night working on a project. Note to self: don't do that again.

Editing post to remove error,

You dont have to use llGetKey(), you can use a sensor event combined with llDetectedKey(), that way the key can be changed on the fly rather than manually changing the key

Eh? When did that happen I wonder (has it always been like that?) ... I suspect they only appear as null when copy asset uuid is used. Curious.

Anyway, I think the OP can still get their desired effect. I've seen pre-existing particles suddenly swerve when the llParticleSystem gets called again with a new target. Even without that, they may be able to accomplish what they're trying with a target set right at first.

ok, well, now I am fairly well confused lol.
This is the area of the script that asks for the object key -

// Select a target for particles to go towards
// "" for no target, "owner" will follow object owner
// and "self" will target this object
// or put the key of an object for particles to go to
key target = "";

I want the particles to head towards another object other than the one they originated from, so it seems I need the key to do this.

...... any suggestions ?

Get the key http://lslwiki.net/lslwiki/wakka.php?wakka=key
BTW you're in the wrong forum.