STA to MTA (once more)

I'll try re-posting with a diff spin....

Given a COM object passed to managed code via an interface method param, is
there any way for me to tell whether the COM object was created in an STA or
MTA? What I really want to do is the managed version of
CoMarshalInterThreadInterfaceInStream, but there appears to be no way to do
this.

Sorry, I'll stop reposting now.  Silence speaks volumes about the
completeness of System.Runtime.Interop.

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