How to get a list of existing local groups on a computer ?

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I am searching some vbscript code to enumerate the existing local groups on a particular computer. I know how to enumerate groups in an active directory container but I don't see how to do it directly on a computer. To give you a better idea, I want the script to give me the same kind of list as the cmd command "net localgroup". Does anybody have an idea ?

Thanks for your help.
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