Re: [PATCH v4 0/1] MR5236: ntdll: Implement NtdllDefWindowProc_A().

[Alexandre Julliard (＠julliard)]

> I see RtlInitializeNtUserPfn() in Windows 10 NTDLL export list, shall we use this to implement upcalls?

Yes, it should do essentially the same thing as NtUserInitializeClientPfnArrays.