Parameter passing in trigger function write in C

[a]

Hey everyone:


I was request to write a trigger that perform the following function:


1, The trigger will be set to exam all statement that will result change of 
datas


2, The trigger will exam three information other than the data updated or 
inserted: user name, password and reasons of change


3, It will record down, in some format, the time and content of the change.


Therefore, I would need some way of passing parameters into the trigger 
function. Can anyone give me some instructions on how to do it or, if it is 
possible??