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Rename machine using WMI in VB.Net

Posted on 2008-06-17
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Last Modified: 2013-11-26
I am looking to call WMI to do a rename and join workgroup.  The following
functions compile cleanly but the renale doesn't seem to work:

Function objGetComputerSystem() As ManagementObject
        Dim objectQuery As New ObjectQuery("select * from
Win32_ComputerSystem")
        Dim searcher As New ManagementObjectSearcher(objectQuery)
        Dim computerSystem As ManagementObject
        Dim computerSystemOut As ManagementObject
        computerSystemOut = Nothing
        For Each computerSystem In searcher.Get()
            computerSystemOut = computerSystem
            Exit For
        Next computerSystem
        Return computerSystemOut
    End Function

    Function renameComputer(ByRef computerSystem As ManagementObject, ByVal
newName As String) As UInt32
        Dim rc As UInt32

        Dim objArgs(1) As Object
        objArgs(0) = newName
        rc = computerSystem.InvokeMethod("Rename", objArgs)
        Return rc

    End Function

    Function JoinWorkgroup(ByRef computerSystem As ManagementObject, ByVal
newWorkgroup As String) As UInt32
        Dim rc As UInt32

        Dim objArgs(5) As Object
        objArgs(0) = newWorkgroup
        objArgs(1) = vbNull
        objArgs(2) = vbNull
        objArgs(3) = vbNull
        objArgs(4) = vbNull


        rc = computerSystem.InvokeMethod("JoinDomainOrWorkgroup", objArgs)
        Return rc

    End Function

The objGetComputerSystem  works but the rename silenlly fails.  I havent
cheched the JoinWorkgroup function yet.  Any Ideas?
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Question by:joseph_schuler
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3 Comments
 
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Accepted Solution

by:
graye earned 125 total points
ID: 21813145
just guessing... but I'm wondering if a reboot is required before the rename takes place
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Author Comment

by:joseph_schuler
ID: 21828652
I knew i would have to reboot, but when the machine was part of a domain I also needed to unjoin it first and then join s workgroup, otherwise the rename would not take place.
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LVL 1

Author Closing Comment

by:joseph_schuler
ID: 31468040
see my last comment
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