USER_PREFERENCES_INFORMATION - NtDoc

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

typedef struct _USER_PREFERENCES_INFORMATION
{
    UNICODE_STRING UserComment;
    UNICODE_STRING Reserved1;
    USHORT CountryCode;
    USHORT CodePage;
} USER_PREFERENCES_INFORMATION, *PUSER_PREFERENCES_INFORMATION;

#endif

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This type is documented in the [MS-SAMR] specification.