#Persistent
FormatTime, StartTimeFormatted
FileAppend, Start = %StartTimeFormatted%, %A_ScriptDir%\Log.txt
StartTime := A_TickCount
OnExit, OnExit
return

OnExit:
FormatTime, StopTimeFormatted
FileAppend, Stop = %StartTimeFormatted%, %A_ScriptDir%\Log.txt
FileAppend, % "Zeit = " (A_TickCount-StartTime)/60000 Minuten, %A_ScriptDir%\Log.txt
return