#ifndef _NTREGAPI_H

/**
 * The KEY_VIRTUALIZATION_INFORMATION structure contains information about the virtualization state of a key.
 *
 * The flags include:
 * - VirtualizationCandidate: The key is part of the virtualization namespace scope (only HKLM\Software for now).
 * - VirtualizationEnabled: Virtualization is enabled on this key. Can be 1 only if VirtualizationCandidate is 1.
 * - VirtualTarget: The key is a virtual key. Can be 1 only if VirtualizationCandidate and VirtualizationEnabled are 0. Valid only on the virtual store key handles.
 * - VirtualStore: The key is a part of the virtual store path. Valid only on the virtual store key handles.
 * - VirtualSource: The key has ever been virtualized, can be 1 only if VirtualizationCandidate is 1.
 * - Reserved: Reserved bits.
 */
typedef struct _KEY_VIRTUALIZATION_INFORMATION
{
    ULONG VirtualizationCandidate : 1;
    ULONG VirtualizationEnabled : 1;
    ULONG VirtualTarget : 1;
    ULONG VirtualStore : 1;
    ULONG VirtualSource : 1;
    ULONG Reserved : 27;
} KEY_VIRTUALIZATION_INFORMATION, *PKEY_VIRTUALIZATION_INFORMATION;

#endif
View code on GitHub

// ntddk.h

typedef struct _KEY_VIRTUALIZATION_INFORMATION {
  ULONG VirtualizationCandidate : 1;
  ULONG VirtualizationEnabled : 1;
  ULONG VirtualTarget : 1;
  ULONG VirtualStore : 1;
  ULONG VirtualSource : 1;
  ULONG Reserved : 27;
} KEY_VIRTUALIZATION_INFORMATION, *PKEY_VIRTUALIZATION_INFORMATION;
View the official Windows Driver Kit DDI reference

NtDoc

This structure is documented in Windows Driver Kit.

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Windows Driver Kit DDI reference (ns-ntddk-_key_virtualization_information)

_KEY_VIRTUALIZATION_INFORMATION structure

Description

The KEY_VIRTUALIZATION_INFORMATION structure defines the basic information that is available for a registry key or subkey.

Members

`VirtualizationCandidate`

Specifies whether the key is part of the virtualization namespace scope.

`VirtualizationEnabled`

Specifies whether virtualization is enabled on this key. This value can be set to 1 only if VirtualizationCandidate is 1.

`VirtualTarget`

Specifies whether the key is a virtual key. This value can be set to 1 only if VirtualizationCandidate and VirtualizationEnabled are both 0. This value is valid only on the virtual store key handles.

`VirtualStore`

Specified whether the key is a part of the virtual store path.

`VirtualSource`

Specifies whether the key has ever been virtualized. This value can be set to 1 only if VirtualizationCandidate is 1.

`Reserved`

This value is reserved for system use.

KEY_VIRTUALIZATION_INFORMATION - NtDoc