I don't know how — I've searched and I will search some more — but it's possible because Microsoft's (formerly Sysinternal's) Process Explorer can list them. (They're listed as "Mutants" for some reason.) If it's just for debugging, maybe that tool will help you.

In reply to Re: List Mutexes on Win32 by ikegami
in thread List Mutexes on Win32 by slloyd

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