NtAlpcOpenSenderThread - NtDoc

#ifndef _NTLPCAPI_H
// begin_private
#if (PHNT_VERSION >= PHNT_VISTA)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtAlpcOpenSenderThread(
    _Out_ PHANDLE ThreadHandle,
    _In_ HANDLE PortHandle,
    _In_ PPORT_MESSAGE PortMessage,
    _Reserved_ ULONG Flags,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ POBJECT_ATTRIBUTES ObjectAttributes
    );

#endif
// end_private
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwAlpcOpenSenderThread(
    _Out_ PHANDLE ThreadHandle,
    _In_ HANDLE PortHandle,
    _In_ PPORT_MESSAGE PortMessage,
    _Reserved_ ULONG Flags,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ POBJECT_ATTRIBUTES ObjectAttributes
    );

#endif
View code on GitHub