Enumerating Antecedent Services for a Single Service

Enumerates all the services that must be running before the SMTP service can be started.

strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
    & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
Set colServiceList = objWMIService.ExecQuery("Associators of " _
 & "{Win32_service.Name='SMTPSVC'} Where " _
    & "AssocClass=Win32_DependentService " & "Role=Dependent")       
For Each objService in colServiceList
    Wscript.Echo objService.DisplayName
Next