I need that. I would like to implement comm status and fault status awareness in WINE's rpcrt4, because my applications crash in WINE because of the lack of proper comm status and fault status awareness in WINE's RPC implementation. From debugging NdClientCall2 in XP I deduce I need this.
Now that we've established you can't do this yourself, a hint on how you can help us: file a bug describing the problem, and produce as small a test case as you can that shows the problem in Wine. Ideally you can write a regression test that succeeds on Windows and fails on Wine. That should give the devs here a pretty strong hint about what needs to be done.
Thanks, --Juan