Find my own process ID in VBScript

mshta terminates itself immediately. Maybe it's too late to achieve parent process id by using WMI service.
So, I'd use something like this to eliminate concurrent script processes.

1. Generate random things.
2. Determine an application which could be installed on each system, never terminates by itself (e.g. command prompt with /k parameter).
3. Start the application in hidden mode with generated random argument (WshShell.Run).
4. Wait a few milliseconds
5. Query the running processes by using command line argument value.
6. Get the ParentProcessId property.

Function CurrProcessId
    Dim oShell, sCmd, oWMI, oChldPrcs, oCols, lOut
    lOut = 0
    Set oShell  = CreateObject("WScript.Shell")
    Set oWMI    = GetObject(_
        "winmgmts:{impersonationLevel=impersonate}!\\.\root\cimv2")
    sCmd = "/K " & Left(CreateObject("Scriptlet.TypeLib").Guid, 38)
    oShell.Run "%comspec% " & sCmd, 0
    WScript.Sleep 100 'For healthier skin, get some sleep
    Set oChldPrcs = oWMI.ExecQuery(_
        "Select * From Win32_Process Where CommandLine Like '%" & sCmd & "'",,32)
    For Each oCols In oChldPrcs
        lOut = oCols.ParentProcessId 'get parent
        oCols.Terminate 'process terminated
        Exit For
    Next
    CurrProcessId = lOut
End Function

Dim ProcessId
ProcessId = CurrProcessId 'will remain valid indefinitely

WScript.Echo ProcessId

Here's an even better code snippet:

      ' ***********************************************************************************************************
      ' lng_MyProcessID finds and returns my own process ID. This is excruciatingly difficult in VBScript. The
      ' method used here forks "cmd /c pause" with .Exec, and then uses the returned .Exec object's .ProcessID 
      ' attribute to feed into WMI to get that process's Win32_Process descriptor object, and then uses THAT
      ' WMI Win32_Process descriptor object's .ParentProcessId attribute, which will be OUR Process ID, and finally
      ' we terminate the waiting cmd process. Execing cmd is what causes the brief cmd window to flash at start up,
      ' and I can' figure out out how to hide that window.

      ' returns: My own Process ID as a long int; zero if we can't get it.
      ' ************************************************************************************************************

      Function lng_MyProcessID ()

        lng_MyProcessID = 0                     ' Initially assume failure

        If objWMIService Is Nothing Then Exit Function      ' Should only happen if in Guest or other super-limited account

        Set objChildProcess = objWshShell.Exec ( """%ComSpec%"" /C pause" ) ' Fork a child process that just waits until its killed

        Set colPIDs= objWMIService.ExecQuery ( "Select * From Win32_Process Where ProcessId=" & objChildProcess.ProcessID,, 0 )

        For Each objPID In colPIDs                  ' There's exactly 1 item, but .ItemIndex(0) doesn't work in XP

          lng_MyProcessID = objPID.ParentProcessId          ' Return child's parent Process ID, which is MY process ID!

        Next

        Call objChildProcess.Terminate()                ' Terminate our temp child

      End Function ' lng_MyProcessID