How to react on highlights? - mIRC Discussion Forums

Code:

 
on *:TEXT:*:#:{ 
  if ( $highlight($1-) != $null ) { 
    dll highlight.dll Popup ....  
   } 
}

This won't work, I got no idea why.
Target is to /dll highlight.dll whenever a word from my highlight-list is used, so there shouldn't be only the "normal" highlight. I don't know how do achieve this...

Another thing would be to only activate the dll if the highlight is used in an inactive channel or if mIRC ist not the active application (both conditions possible).

Thx in advance
ahrens