KEY_VALUE_ENTRY - NtDoc

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

typedef struct _KEY_VALUE_ENTRY
{
    PUNICODE_STRING ValueName;
    ULONG DataLength;
    ULONG DataOffset;
    ULONG Type;
} KEY_VALUE_ENTRY, *PKEY_VALUE_ENTRY;

#endif

View code on GitHub

This structure is documented in Windows Driver Kit.