struct ETW_PROVIDER_TABLE_ENTRY

typedef struct _ETW_PROVIDER_TABLE_ENTRY
{
     LONG RefCount;
     ETW_PROVIDER_STATE State;
     PETW_REG_ENTRY RegEntry;
     PVOID Caller;
} ETW_PROVIDER_TABLE_ENTRY, *PETW_PROVIDER_TABLE_ENTRY;

Windows Vista Kernel Structures