Mass messsage mIRC alias

alias massmsg {
  if ( !$2 ) {
    echo -a * /massmsg: insufficient parameters: /massmsg <#channel> <your message>
    halt
  }
  var %nicks 1
  while ( %nicks <= $nick($1,0) ) {
    msg $nick($1,%nicks) $2-
    inc %nicks
  }
  unset %nicks
  halt
}