How to bind to a managed unit in VB script

I have a request to generate an email list of the contents of a managed unit (that is populated by several different queries) any time the group membership changes. I can do this with a Modify trigger easy enough but that part I am missing is how do I bind to the managed unit in VB? I have lots of scripts that bind to AD groups directly to do reporting but I've never tried to bind to a managed unit before.

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