NtSetInformationVirtualMemory - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTMMAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)
#if (PHNT_VERSION >= PHNT_WIN8)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtSetInformationVirtualMemory(
    _In_ HANDLE ProcessHandle,
    _In_ VIRTUAL_MEMORY_INFORMATION_CLASS VmInformationClass,
    _In_ ULONG_PTR NumberOfEntries,
    _In_reads_(NumberOfEntries) PMEMORY_RANGE_ENTRY VirtualAddresses,
    _In_reads_bytes_(VmInformationLength) PVOID VmInformation,
    _In_ ULONG VmInformationLength
    );

#endif
#endif
#endif

View code on GitHub
#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwSetInformationVirtualMemory(
    _In_ HANDLE ProcessHandle,
    _In_ VIRTUAL_MEMORY_INFORMATION_CLASS VmInformationClass,
    _In_ ULONG_PTR NumberOfEntries,
    _In_reads_(NumberOfEntries) PMEMORY_RANGE_ENTRY VirtualAddresses,
    _In_reads_bytes_(VmInformationLength) PVOID VmInformation,
    _In_ ULONG VmInformationLength
    );

#endif

View code on GitHub

This function is documented in Windows Driver Kit.