#ifndef _NTMMAPI_H
// Misc.
#if (PHNT_MODE != PHNT_MODE_KERNEL)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtCreatePagingFile(
    _In_ PUNICODE_STRING PageFileName,
    _In_ PLARGE_INTEGER MinimumSize,
    _In_ PLARGE_INTEGER MaximumSize,
    _In_ ULONG Priority
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwCreatePagingFile(
    _In_ PUNICODE_STRING PageFileName,
    _In_ PLARGE_INTEGER MinimumSize,
    _In_ PLARGE_INTEGER MaximumSize,
    _In_ ULONG Priority
    );

#endif
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Function NtCreatePagingFile is typically used by Control Panel's "System" applet for creating new paged files.

PageFileName

System path to newly created paged file.

MinimumSize

Minimum size of paged file, in bytes. This value must be multiply of page size (0x1000 bytes on x86), and must be greater then 2MB (0x02000000 bytes).

MaximumSize

Maximum size of paged file, in bytes. Also this value must be multiply of page size. Minimal value accepted is 5MB (0x05000000 bytes).

ActualSize

Optional (and currently unused) parameter.

Documented by

Tomasz Nowak
ReactOS

Requirements

Privilege: SE_CREATE_PAGEFILE_PRIVILEGE