Func _MyTrayIcon ($IconFile = $MyScriptIcon, $IconNr = 0) 
#NoTrayIcon ; prevents the standard AutoIt icon from being shown right from the start ;;;;;;;;;;;; wirkt leider auch außerhalb dieser Funktion 
If $IconFile = "shell32" OR $IconFile = "shell32.dll" Then $IconFile = @SystemDir & "\shell32.dll" 
If FileExists ($IconFile) Then 
 TraySetIcon ($IconFile, $IconNr) 
 Return 1 
Else 
 TraySetIcon() ; Shows the standard AutoIt icon (and of course returns 0) 
EndIf 
EndFunc 


Sleep (3000) 

MsgBox (0, "Und?", "Hat man ein Symbol gesehen?")