Doubt on labels as: OnPCKillEvent

[Black Box]

Which files change, to add new labels and where I find the implementation of existing?
 
 
example:
 
OnPCKillEvent
 
Ps: I found the statements, but not i found the implementations.

 

[Angelmelody]

example:
https://github.com/MrKeiKun/Hercules/commit/a7280f7e1e1f3f78288d60df0fd7b77748c63fc7

 

[Black Box]

example:

https://github.com/MrKeiKun/Hercules/commit/a7280f7e1e1f3f78288d60df0fd7b77748c63fc7

Thank @@Angelmelody but to stay perfect, how can I find the implementation of OnPCKillEvent?
 
Ps: I tried to search for these labels in every files and not i found. The reason is to base myself in this implementation to create others.

 

[Angelmelody]

OnPCKillEvent was added in time of eathena and different  src struct from now ,
all you have to do is to search NPCE_KILLPC  and kill_pc_event_name ,then

you can see the implementations of OnPCKillEvent

 

[Black Box]

OnPCKillEvent was added in time of eathena and different  src struct from now ,

all you have to do is to search NPCE_KILLPC  and kill_pc_event_name ,then

you can see the implementations of OnPCKillEvent

Thank @@Angelmelody, the implementations are in pc.c.