Here's a little snippet of code I found on http://www.BrainBuzz.com posted by MBrecht.
code:

Create Loginlog
Login-Logging that fix the open file Problem

;Writeaccess on a File from more than one User is not possible.
;This script wait 5x3 secounds for writeaccess
;
$LogFile="G:\Folder\Login.log" 
$Err=0
$n=0
Do
  $Err=Open(1,$LogFile,5)
  If $Err<>0
  If $n=0
      ;First wait  
      ? "Please wait" 
    else
      ;follow waits 
      "."
    Endif
    Sleep 3
  else	
    $Err=WriteLine(1,@DATE+";"+@TIME+";"+@SID+";"+@USERID+";"+@WKSTA+";"+@HOSTNAME+";"+@IPADDRESS0+";"+@ADDRESS+";"+@LSERVER+";"+@RSERVER+";"+@INWIN+";"+$isDFS+Chr(13)+Chr(10))
    $Err=Close(1)
  Endif
  $n=$n+1
Until $Err=0 OR $n=5
_________________________
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