FILE_FS_LABEL_INFORMATION - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
#ifndef _NTIOAPI_H

typedef struct _FILE_FS_LABEL_INFORMATION
{
    ULONG VolumeLabelLength;
    _Field_size_bytes_(VolumeLabelLength) WCHAR VolumeLabel[1];
} FILE_FS_LABEL_INFORMATION, *PFILE_FS_LABEL_INFORMATION;

#endif

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This structure is documented in Windows Driver Kit.

Structure is an input buffer for NtSetVolumeInformationFile call with information class FileFsLabelInformation.

VolumeLabelLength

Length of VolumeLabel array, in bytes.

VolumeLabel[1]

Label for specified volume.

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