#ifndef _NTLPCAPI_H
// begin_private

/**
 * The NtAlpcCreatePortSection routine creates a port section for large data transfers.
 *
 * \param PortHandle Handle to the ALPC port.
 * \param Flags Section creation flags.
 * \param SectionHandle Optional handle to an existing section object.
 * \param SectionSize Size of the section.
 * \param AlpcSectionHandle Receives the ALPC section handle.
 * \param ActualSectionSize Receives the actual size of the section created.
 * \return NTSTATUS Successful or errant status.
 */
_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
NtAlpcCreatePortSection(
    _In_ HANDLE PortHandle,
    _In_ ULONG Flags,
    _In_opt_ HANDLE SectionHandle,
    _In_ SIZE_T SectionSize,
    _Out_ PALPC_HANDLE AlpcSectionHandle,
    _Out_ PSIZE_T ActualSectionSize
    );

// end_private
#endif
View code on GitHub

#ifndef _NTZWAPI_H

_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
ZwAlpcCreatePortSection(
    _In_ HANDLE PortHandle,
    _In_ ULONG Flags,
    _In_opt_ HANDLE SectionHandle,
    _In_ SIZE_T SectionSize,
    _Out_ PALPC_HANDLE AlpcSectionHandle,
    _Out_ PSIZE_T ActualSectionSize
    );

#endif
View code on GitHub