Demonstration script that modifies the user name and password for IIS application pools.

Visual Basic
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strComputer = "."
Set objWMIService = GetObject _
    ("winmgmts:{authenticationLevel=pktPrivacy}\\" _
        & strComputer & "\root\microsoftiisv2")

Set colItems = objWMIService.ExecQuery _
    ("Select * from IIsApplicationPoolsSetting")

For Each objItem in colItems
    objItem.WAMUserName = "TestUser"
    objItem.WAMUserPass = "ur^354Hdf"
    objItem.Put_
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