#ifndef _NTIOAPI_H
#if !defined(NTDDI_WIN11_GE) || (NTDDI_VERSION < NTDDI_WIN11_GE)
typedef struct _FILE_CASE_SENSITIVE_INFORMATION
{
ULONG Flags;
} FILE_CASE_SENSITIVE_INFORMATION, *PFILE_CASE_SENSITIVE_INFORMATION;
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This structure is documented in Windows Driver Kit.