#ifndef _NTEXAPI_H

typedef struct _SYSTEM_PAGEFILE_INFORMATION
{
    ULONG NextEntryOffset;
    ULONG TotalSize;
    ULONG TotalInUse;
    ULONG PeakUsage;
    UNICODE_STRING PageFileName;
} SYSTEM_PAGEFILE_INFORMATION, *PSYSTEM_PAGEFILE_INFORMATION;

#endif
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Structure SYSTEM_PAGEFILE_INFORMATION is used as a result of call NtQuerySystemInformation with SystemPageFileInformation information class. If contains information about currently installed Paged Files (files used by system for swap paged pool memory to disk).

NextEntryOffset

Offset to next SYSTEM_PAGEFILE_INFORMATION structure or zero, if it's last one.

TotalSize

Size of paged file, in pages (Size of page depend on machine type, for x86 one page is 0x1000 (4096) bytes).

TotalInUse

Number of currently used pages in paged file.

PeakUsage

Maximum number of pages used in this boot session.

PageFileName

System path to paged file.

Documented by

Tomasz Nowak