POWER_THROTTLING_THREAD_STATE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTPSAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)
// begin_private

typedef struct _POWER_THROTTLING_THREAD_STATE
{
    ULONG Version;
    ULONG ControlMask;
    ULONG StateMask;
} POWER_THROTTLING_THREAD_STATE, *PPOWER_THROTTLING_THREAD_STATE;

// end_private
#endif
#endif

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This structure is documented in Windows Driver Kit.