Code:
If Open(1,"my.log") = 0
   $strLine = ReadLine(1)
   While @ERROR = 0
      $strLine = ReadLine(1)
   Loop
EndIf

? "Last line in the file is "$strLine


Or if you need to manipulate the data in the file in any way..

 Code:
$strCount = 0
If Open(1,"my.log") = 0
   $strLine = ReadLine(1)
   While @ERROR = 0
      redim preserve $lineArray[$strCount]
      $LineArray[$strCount] = $strLine
      $strLine = ReadLine(1)
      $strCount = $strCount + 1
   Loop
EndIf

? "Last line in the file is "$LineArray[$strCount]
_________________________
Today is the tomorrow you worried about yesterday.