#ifndef _NTRTL_H

//typedef struct _SYSTEM_FEATURE_USAGE_SUBSCRIPTION_UPDATE
//{
//    ULONG UpdateCount;
//    _Field_size_(UpdateCount) SYSTEM_FEATURE_USAGE_SUBSCRIPTION_UPDATE_ENTRY Updates[ANYSIZE_ARRAY];
//} SYSTEM_FEATURE_USAGE_SUBSCRIPTION_UPDATE, *PSYSTEM_FEATURE_USAGE_SUBSCRIPTION_UPDATE;

// private
typedef struct _RTL_FEATURE_CONFIGURATION_TABLE
{
    ULONG FeatureCount;
    _Field_size_(FeatureCount) RTL_FEATURE_CONFIGURATION_INTERNAL Features[ANYSIZE_ARRAY];
} RTL_FEATURE_CONFIGURATION_TABLE, *PRTL_FEATURE_CONFIGURATION_TABLE;

#endif
View code on GitHub