typedef struct _SECURITY_QUALITY_OF_SERVICE { /* sqos */
DWORD Length;
SECURITY_IMPERSONATION_LEVEL ImpersonationLevel;
SECURITY_CONTEXT_TRACKING_MODE ContextTrackingMode;
BOOLEAN EffectiveOnly;
} SECURITY_QUALITY_OF_SERVICE ;
The SECURITY_QUALITY_OF_SERVICE data structure and several related data types are used for server/client impersonation tasks.