#ifndef _NTREGAPI_H

/**
 * The KEY_WRITE_TIME_INFORMATION structure is used by the system to set the last write time for a registry key.
 * \sa https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/ns-wdm-_key_write_time_information
 */
typedef struct _KEY_WRITE_TIME_INFORMATION
{
    LARGE_INTEGER LastWriteTime; // Number of 100-nanosecond intervals since this key or any of its values changed.
} KEY_WRITE_TIME_INFORMATION, *PKEY_WRITE_TIME_INFORMATION;

#endif
View code on GitHub

// wdm.h

typedef struct _KEY_WRITE_TIME_INFORMATION {
  LARGE_INTEGER LastWriteTime;
} KEY_WRITE_TIME_INFORMATION, *PKEY_WRITE_TIME_INFORMATION;
View the official Windows Driver Kit DDI reference

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This structure is documented in Windows Driver Kit.

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Windows Driver Kit DDI reference (ns-wdm-_key_write_time_information)

_KEY_WRITE_TIME_INFORMATION structure

Description

The KEY_WRITE_TIME_INFORMATION structure is used by the system to set the last write time for a registry key.

Members

`LastWriteTime`

Specifies the last time that the key was changed. This time value is expressed in absolute system time format. Absolute system time is the number of 100-nanosecond intervals since the start of the year 1601 in the Gregorian calendar.