Well, first of all I will try to clarify my situation and at the end of the post I will explain what am I asking.
I was looking for hours the functions of register_event but i can't find in anywhere in the wiki or in documentations of amx mod X in this 2 sites.
http://www.amxmodx.org/doc/
https://www.amxmodx.org/api/amxmodx/register_event
You can see each flag, an easy and simple explanation and the important thing: what each one of them do. (but not in events and functions. The site just explain what are both but they aren't showing all the events and functions that both have)
What I found where it show all the events and also explain what each event does is in here and it explain them what each one do clearly in a simple way what they do.
https://wiki.alliedmods.net/Half-Life_1_Game_Events
But in case of the functions

I can't find them in anywhere (a list) like the most common "hooked_death" (Such as the list in the second link I shared above about the events) The problem is trying to figure out what exactly they do! Like test the plugin in the server or experimenting when i compile the source code and test it. Specifically to learn to script in this way at some extent is frustrating to me, even watching samples in tutorials thread, in simple codes it's boring to me. By now i'm learning to script in amxmodx through plugins because to me is a fun way to learn.
So I'm asking if there are in somewhere a list of the functions that register_event has?
My best Regards

and sorry for my bad english