Hey there,
I wrote a script that lets the player shoot a ball at a wall. Now each time the wall is hit I subtract some hitpoints (skill 1) from the wall. When the Wall's skill 1 reaches zero ent_remove is used to remove it.
In the script I wrote an event that would be called from the Wall once it is hit (my.event... my.skill1 -= 10; etc...).

Since the level has grown and grown it seems smarter to let the ball/missile/bullet/whatever "carry" its own event that would simply decrease one's health via your.skill1 -= 10;.
Unfortunately I get all kinds of errors when using the "your" prefix.

Aum54 give a good introduction to events.
The manual places only one restriction - you can't use wait.
I've been looking for this in Aum - they only have games where the "enemy" reduces its own health and maybe distinguishes between the different weapons it is hit with.

So here's the question: in general is it possible to let the projectile "carry" the event and then simply change all variables/skills using the "your" prefix?

Thanks for taking the time,
a newbie

If I understand what you want, you want a Bullet that removes when it hits anything?

If yes, use:

function remove()
{
ptr_remove(me);
}

function bullet()
{
my.emask |= ENABLE_IMPACT;
my.event = remove;
while(1)
{
c_move(me, vector(13 * time_step, 0,0), nullvector, ACTIVATE_SHOOT);
wait(1);
}

I suppose your walls are entities then? You can use EVENT_ENTITY then, and remember to check whether the "you/your" pointer is valid, like this:

if(event_type == EVENT_ENTITY && you != NULL)
{
you.skill1 -= 5; // Decrease healthpoints
}

Edit: if the error(s) you are getting are 'empty pointer'-errors, this might be worth reading:
http://www.nighthawk.dk/v5/index.asp?PageID=ShowArticle&ID=5
It's c-script syntax though, but might still be worth reading