IVssBackupComponentsEx::SetSelectedForRestoreEx method (vsbackup.h)

The SetSelectedForRestoreEx method indicates whether the specified selectable component is selected for restoration to a specified writer instance.

Syntax

HRESULT SetSelectedForRestoreEx(
  [in] VSS_ID             writerId,
  [in] VSS_COMPONENT_TYPE ct,
  [in] LPCWSTR            wszLogicalPath,
  [in] LPCWSTR            wszComponentName,
  [in] bool               bSelectedForRestore,
  [in] VSS_ID             instanceId
);

Parameters

[in] writerId

Globally unique identifier (GUID) of the writer class.

[in] ct

Type of the component. See VSS_COMPONENT_TYPE for the possible values.

[in] wszLogicalPath

Null-terminated wide character string containing the logical path of the component. For more information, see Logical Pathing of Components.

The value of the string containing the logical path used here should be the same as was used when the component was added.

The logical path can be NULL.

There are no restrictions on the characters that can appear in a non-NULL logical path.

[in] wszComponentName

Null-terminated wide character string containing the name of the component.

The string cannot be NULL and should contain the same component name as was used when the component was added to the backup set using the IVssBackupComponents::AddComponent method.

[in] bSelectedForRestore

If the value of this parameter is true, the selected component has been selected for restoration. If the value is false, the selected component has not been selected for restoration.

[in] instanceId

GUID of the writer instance.

The default value for this parameter is GUID_NULL.

Return value

The following are the valid return codes for this method.

Remarks

SetSelectedForRestoreEx, which moves a component to a different writer instance, can be called only for a writer that supports running multiple writer instances with the same class ID and supports a requester moving a component to a different writer instance at restore time. To determine whether a writer provides this support, call the IVssExamineWriterMetadata::GetBackupSchema method.

SetSelectedForRestoreEx has meaning only for restores taking place in component mode.

SetSelectedForRestoreEx can be called only for components that were explicitly added to the backup document at backup time using AddComponent. Restoring a component that was implicitly selected for backup as part of a component set must be done by calling SetSelectedForRestoreEx on the closest ancestor component that was added to the document. If only this component's data is to be restored, that should be accomplished through the IVssBackupComponents::AddRestoreSubcomponent method; this can be done only if the component is selectable for restore (see Working with Selectability and Logical Paths).

This method must be called before the IVssBackupComponents::PreRestore method.

The distinction between the instanceId and writerID parameters is necessary because it is possible that multiple instances of the same writer are running on the computer.

If the value of the instanceId parameter is GUID_NULL, this is equivalent to calling the IVssBackupComponents::SetSelectedForRestore method.

The instanceId parameter is used to specify that the component is to be restored to a different writer instance. If the value of the instanceId parameter is not GUID_NULL, it must match the instance ID of a writer instance with the same writer class ID specified in the writerID parameter.

A writer's class identifier, instance identifier, and instance name can be found by calling the IVssExamineWriterMetadataEx::GetIdentityEx method.

Requirements

See also

IVssBackupComponents::SetSelectedForRestore

IVssBackupComponentsEx

IVssExamineWriterMetadata::GetBackupSchema

IVssExamineWriterMetadataEx::GetIdentityEx