Checking iTunes for a Track change?

Question

okay so im about 2 days old when i comes to Applescript. I made a script that plays a track in iTunes notifies me of its name with growl which maintains a db of every song title. and does text to speech for me. is there anyway to Automatically check for a track change in iTunes and then the script automatically exectutes? if so how would I do that. and what is the scripting syntax to check for a event in a program? such as a keypress or a trackchange. thanks for all your help in advance

Answer 1

iTunes since you're targeting that application.
ugh sorry for my helpless ness XD I just switched over from a PC to a mac and the conversion is a little tricky. im having some trouble with my code again. here it is
global lasttrack
on run
--iTunes Setup for launch of the code
tell application "iTunes"
set TrackName to name of current track
set TrackArtist to artist of current track
say "Now Playing " & TrackName & " by " & TrackArtist
set lasttrack to TrackName
end tell
--the first track gets its own tell
tell application "GrowlHelperApp"
notify with name lasttrack title lasttrack description "Now Playing " & lasttrack application name "iTunes Notifations"
end tell
end run
--now comes the idle checks
on idle
tell application "iTunes"
set currentTrack to name of current track
set TrackArtist to artist of current track
end tell
if currentTrack is not lasttrack then
tell application "GrowlHelperApp"
notify with name currentTrack title currentTrack description "Now Playing " & currentTrack & " by " & TrackArtist application name "iTunes Notifations"
end tell
say "Now Playing " & TrackName & " by " & TrackArtist
end if
return 10
end idle
only when I run it it doesnt do anything...it says the name the first time. runs through the script then it stops running...