how to add a log to my vbscript - vbscript

Question

i have this script that reads a list of computers and check to see if the computers have the right software version install. the script echo to me the computers with the wrong version, but i want to make a log instead
Dim strComputer, objFSO, ObjShell, strDisplayName, objList, strObject
Dim objReg, arrSubKeys, strProduct, strVersion, strReqVersion
Const For_Writing = 2
Const ForReading = 1
const ForAppending = 3
Const HKLM = &H80000002
Const strKeyPath = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"
strReqVersion = "8.2.1 MP2"
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objShell = CreateObject("WScript.Shell")
Set objList = objFSO.OpenTextFile("c:\test\test.txt",ForReading)
Do While Not objList.AtEndOfStream
strComputer = objList.ReadLine
If HostOnline(strComputer) = True Then
Inventory(strComputer)
End If
Loop
Function Inventory(strComputer)
Set objTextFile = objFSO.OpenTextFile("c:\test\inventory.txt",2,true)
'creating a dictionary object
Set objDictionary = CreateObject("Scripting.Dictionary")
Set objReg = GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & _
strComputer & "\root\default:StdRegProv")
' Enumerate the subkeys of the Uninstall key
objReg.EnumKey HKLM, strKeyPath, arrSubKeys
For Each strProduct In arrSubKeys
' Get the product's display name
objReg.GetStringValue HKLM, strKeyPath & "\" & strProduct, "DisplayName", strDisplayName
' Process only products whose name contain 'symantec'
If InStr(1, strDisplayName, "Symantec", vbTextCompare) > 0 Then
' Get the product's display version
objReg.GetStringValue HKLM, strKeyPath & "\" & strProduct, "DisplayVersion", strVersion
If strReqVersion <> strVersion Then
WScript.Echo strObject
objDictionary.Add strComputer, strVersion
For Each strObject In objDictionary
WScript.Echo strObject
objTextFile.WriteLine(strObject)
Next
objTextFile.Close
End If
End If
Next
End Function
Function HostOnline(strComputername)
'---------- Test to see if host or url alive through ping -----------------
' Returns True if Host responds to ping
'
' strComputername is a hostname or IP
Const OpenAsASCII = 0
Const FailIfNotExist = 0
Const ForReading = 1
Dim objShell, objFSO, sTempFile, fFile
Set objShell = CreateObject("WScript.Shell")
Set objFSO = CreateObject("Scripting.FileSystemObject")
sTempFile = objFSO.GetSpecialFolder(2).ShortPath & "\" & objFSO.GetTempName
objShell.Run "cmd /c ping -n 2 -l 8 " & strComputername & ">" & sTempFile, 0 , True
Set fFile = objFSO.OpenTextFile(sTempFile, ForReading, FailIfNotExist, OpenAsASCII)
Select Case InStr(fFile.ReadAll, "TTL=")
Case 0
HostOnline = False
Case Else
HostOnline = True
End Select
ffile.close
objFSO.DeleteFile(sTempFile)
Set objFSO = Nothing
Set objShell = Nothing
End Function
can some one help me please thanks

Answer 1

There are several ways to do this. The simplest way, without any modification to your script, would be to call the script with cscript.exe (in a command prompt) and redirect the output to a file:
cscript your.vbs > output.log
However, if you want a log to be created even when users double-click your script you'll have to change your script so that it writes to a file instead of echoing the output. Open the log file at the beginning of the script:
Set myLog = objFSO.OpenTextFile("C:\my.log", For_Writing, True)
replace WScript.Echo ... with myLog.WriteLine ..., and close the file before you exit from the script:
myLog.Close
A somewhat more sophisticated approach would be to create a set of logging functions, which will allow you create log lines depending on certain conditions, e.g. LogInfo() for informational log messages and LogError() for errors.
Shameless plug: Some time ago I got fed up with writing the same boilerplate logging functions over and over again, so I wrote a logger class that encapsulates the usual logging facilities (interactive console, files, eventlog) and provides logging methods for 4 log levels (Error, Warning, Information, Debug). The class can be used for logging to a file like this:
Set myLog = New CLogger
myLog.LogToConsole = False
myLog.LogFile = "C:\my.log"
myLog.LogInfo "info message"
...
myLog.LogError "an error occurred"
The log file is automatically closed when the object is released.

Answer 2

Why not use the system's event log? I described how in this answer
It means most of the work is done for you and you don't need to worry about where to put your log file