#ifndef _NTIOAPI_H
// NtQueryQuotaInformationFile/NtSetQuotaInformationFile types
typedef struct _FILE_GET_QUOTA_INFORMATION
{
ULONG NextEntryOffset;
ULONG SidLength;
_Field_size_bytes_(SidLength) SID Sid;
} FILE_GET_QUOTA_INFORMATION, *PFILE_GET_QUOTA_INFORMATION;
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This structure is documented in Windows Driver Kit.