If you go to command prompt and type in wbemtest and enter.

Hit connect.

Change the location from:

root\default to root\cimv2 and hit login

Hit enumerate classes, use recursive radio button, hit ok

You will no have a list of all the classes and their properties.  You can scroll down to Win_NTLogEvent to see the properties in the middle window.

Or you can cut and paste this script as ClassInfo.vbs

Const wbemFlagReturnImmediately = &h10

Const wbemFlagForwardOnly = &h20

On Error Resume Next

arrComputers = Array(".")

For Each strComputer In arrComputers

   WScript.Echo

   WScript.Echo "=========================================="

   WScript.Echo "Computer: " & strComputer

   WScript.Echo "=========================================="

strClass = "Win32_NTEventLog"

Get objWMIService = _

   GetObject("winmgmts:{impersonationLevel=impersonate}root\cimv2")

Set colClasses = objWMIService.ExecQuery("SELECT * FROM " & strClass, "WQL", _

                                          wbemFlagReturnImmediately + wbemFlagForwardOnly)

i = 0

For Each objClass In colClasses

   i = i + 1

   If i = 1 Then

   WScript.Echo "* Properties *"

   For Each objProperty In objClass.Properties_

      WScript.Echo objProperty.Name

   Next

   WScript.Echo vbNewLine & "* Methods *"

   For Each objMethod In objClass.Methods_

      WScript.Echo objMethod.Name

   Next

   End If

Next

Next

Hope this helps