USER_PRIMARY_GROUP_INFORMATION - NtDoc

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

typedef struct _USER_PRIMARY_GROUP_INFORMATION
{
    ULONG PrimaryGroupId;
} USER_PRIMARY_GROUP_INFORMATION, *PUSER_PRIMARY_GROUP_INFORMATION;

#endif

View code on GitHub

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