Closing cmd window after script execution

The next script opens a cmd window to call an external command, and after using it the cmd window stays open. how do i close it??

Because wshShell.Quit doesn't work, it returns an error. Is there any of way of closing it?

this is the script

Option Explicit
Dim objWMIService, objProcess, objFSO, objTextFile
dim colProcess,colServices, colItems
dim objItem, objService
Dim strComputer, strProcessKill, strProcessMem
Dim memLimit, processMem
Dim mustKill
Dim WshShell
Const ForAppending = 8

Set WshShell = WScript.CreateObject("WScript.Shell") 
strComputer = "."
strProcessKill = "'DLLHOST.EXE'"
strProcessMem = "'DLLHOST'"
memLimit = 10000
mustKill = 0
 
Set objWMIService = GetObject("winmgmts:" & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
Set colProcess = objWMIService.ExecQuery ("Select * from Win32_Process Where Name = " & strProcessKill )
dim intRC
For Each objProcess in colProcess    
    processMem = objProcess.WorkingSetSize/1024
                If processMem >= memLimit Then
		       mustKill = 1
                End If    
    if mustKill = 1 then		
 	Set objFSO = CreateObject("Scripting.FileSystemObject")
	Set objTextFile = objFSO.OpenTextFile ("c:\informe_dllhost.txt", ForAppending, True)
	objTextFile.WriteLine(now & vbnewline & " Process has been killed with " & processMem & " Kb" & vbnewline & vbNewLine)
	objTextFile.Close
	wshShell.Run "cmd /k C:\pskill.exe -accepteula dllhost.exe", 1, True	
	WScript.Quit
    end if
Next
 
WScript.Quit

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