PO_INTERNAL_WAKE_SOURCE_TYPE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTPOAPI_H

typedef enum _PO_INTERNAL_WAKE_SOURCE_TYPE
{
    InternalWakeSourceDozeToHibernate = 0,
    InternalWakeSourcePredictedUserPresence = 1
} PO_INTERNAL_WAKE_SOURCE_TYPE;

#endif

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This enumeration is documented in Windows Driver Kit.