typedef struct _TOKEN_PRIMARY_GROUP {
PSID PrimaryGroup;
} TOKEN_PRIMARY_GROUP ;
The TOKEN_PRIMARY_GROUP data structure is a token that specifies a group SID that will be assigned as a primary group.
PrimaryGroup
Contains a pointer to an SID that will be assigned as the primary group of any objects created on behalf of the user represented by the token. The SID must be one of the group SIDs already in the token.