#ifndef _NTMMAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * Unlocks a specified range of pages in the virtual address space of a process, enabling the system to swap the pages out to the paging file if necessary.
 *
 * @param ProcessHandle A handle to the process whose virtual address space is to be unlocked.
 * @param BaseAddress A pointer to the base address of the region of pages to be unlocked.
 * @param RegionSize The size of the region to be unlocked, in bytes. The size is rounded up to the nearest multiple of PAGE_SIZE.
 * @param MapType A bitmask containing one or more flags that specify the type of operations to be performed.
 * @return NTSTATUS Successful or errant status.
 * @sa https://learn.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualunlock
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtUnlockVirtualMemory(
    _In_ HANDLE ProcessHandle,
    _Inout_ PVOID *BaseAddress,
    _Inout_ PSIZE_T RegionSize,
    _In_ ULONG MapType
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwUnlockVirtualMemory(
    _In_ HANDLE ProcessHandle,
    _Inout_ PVOID *BaseAddress,
    _Inout_ PSIZE_T RegionSize,
    _In_ ULONG MapType
    );

#endif
View code on GitHub