register_event
Core (amxmodx.inc)
Description
register_event - Registers an event on which a given function will be called
Syntax
register_event ( const event[], const function[], const flags[], [ cond=[], ... ] )
Type
Native
Notes
event is a message, such as "DeathMsg", "Damage", et cetera.

function is the name of a public function which will be called on this event.

flags is a combination of flags that determine if this event is forwarded:
"a" - Global Event
"b" - Event sent to a single target
"c" - Send only once when repeated to other players
"d" - Only if sent to a dead player
"e" - Only if sent to an alive player

You can optionally set a list of restrictions/conditions on the event. For example:
"2=c4" - 2nd parameter of message must be sting "c4".
"3>10" - 3rd parameter must be greater then 10.
"3!4" - 3rd must not be 4.
"2&Buy" - 2nd parameter of message must contain "Buy" substring.
"2!Buy" - 2nd parameter of message can't contain "Buy" substring.

Example:

public plugin_init()

   //Only called if killer is not worldspawn 
   register_event("DeathMsg", "hook_death", "a", "1>0")
}

public hook_death()

   new Killer = read_data(1)
   new Victim = read_data(2)
}

User Contributed Notes
wchristian at gmx dot ch Dec-26-04 21:15:52
Hi, Correction ;) You need to type "meta game" (it's key sensitive ;))

burnincoldblue at comcast dot net Oct-20-04 04:24:18
If you have a server running you can type "meta Game" into the console showing you all the messages that you can use with this function.