Help between some jass coding

[risen_jihad]

What all is the differnece between:
VENT_PLAYER_UNIT_SPELL_FINISH
EVENT_PLAYER_UNIT_SPELL_ENDCAST
EVENT_PLAYER_UNIT_SPELL_EFFECT
EVENT_PLAYER_UNIT_SPELL_CHANNEL
EVENT_PLAYER_UNIT_SPELL_CAST

In the map, whenever a unit casts a certain spell it places units. However it is bugged so that you can begin casting the spell to place units, but if you quickly hit h/s it places the units but the spell is still on cooldown. As it is, it is ENDCAST. What is the difference between all 5?

 

[phyrex1an]

EVENT_PLAYER_UNIT_SPELL_CHANNEL : useless, ignore it
EVENT_PLAYER_UNIT_SPELL_CAST : To detect the moment before a unit spends mana/cooldown and is about to cast a spell
EVENT_PLAYER_UNIT_SPELL_EFFECT : The exact moment a unit casts the spell and consumes mana/cooldown
EVENT_PLAYER_UNIT_SPELL_FINISH : The unit has succesfully ended casting the spell
EVENT_PLAYER_UNIT_SPELL_ENDCAST: The unit stopped casting the spell (either succesfully or not)

Use EFFECT unless there is a good reason to use something else.

 

[risen_jihad]

thank you
I was having troubles with that