Hook

From GMod Wiki

Library Functions

Shared

hook.Add
hook.Call
hook.GetTable
hook.Remove

Hooks

A Hook is function that is called when an event happens. There can be an unlimited amount of Hooks hooked to one event when called with hook.Add, but only one hook when overriding the event's function such as GM:PlayerSpawn.

Example:

Description	This would call the function NotifyOfSpawn() in the event of a player spawning.
Used on
Code	function NotifyOfSpawn(ply) print("The player "..ply:Nick().." spawned.") end   hook.Add( "PlayerSpawn", "PlayerSpawnMessages", NotifyOfSpawn )
Output	N/A