Quote:
on START event uses the same format as on Load, and triggers the first time a script is loaded and every time after that when mIRC is run.


if you want to detect if a user is runing an mirc-script for the first time on startup see below:

Code:
  
on 1:start:{ 
  inc %startup 
  if (%startup == 1) { dialog -m somedialog somedialog }
}