no you can't create your own events but if you want a function to be called whenever someone uses a knife then you probably want to register the "CurWeapon" event then check to see if they switched to a knife using read_data(2) and comparing it to CSW_KNIFE
Example:
Code:
new wpn = read_data(2)
if(wpn == CSW_KNIFE)
doStuff(id)
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