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The following enumerations are defined in the Volume Shadow Copy API.
| Name | Description |
|---|---|
| VSS_ALTERNATE_WRITER_STATE | Defines the set of valid states used to indicate whether a writer has an associated alternate writer. |
| VSS_APPLICATION_LEVEL | Defines the set of valid application levels. |
| VSS_BACKUP_SCHEMA | Defines the set of backup schemas—operations a writer can participate in. |
| VSS_BACKUP_TYPE | Defines the set of backup types. |
| VSS_COMPONENT_FLAGS | Indicates support for auto-recovery. |
| VSS_COMPONENT_TYPE | Defines the set of component types. |
| VSS_FILE_RESTORE_STATUS | Defines the set of statuses of a file restore operation. |
| VSS_FILE_SPEC_BACKUP_TYPE | Defines the set of backup operations supported by writers. |
| _VSS_HARDWARE_OPTIONS | Defines shadow copy LUN flags. |
| VSS_MGMT_OBJECT_TYPE | Discriminant for the VSS_MGMT_OBJECT_UNION union within the VSS_MGMT_OBJECT_PROP structure. |
| VSS_OBJECT_TYPE | Used to identify an object as a shadow copy set, shadow copy, or provider. |
| VSS_PROTECTION_FAULT | Defines the set of shadow copy protection faults. |
| VSS_PROTECTION_LEVEL | Defines the set of volume shadow copy protection levels. |
| VSS_PROVIDER_CAPABILITIES | Reserved for future use. |
| VSS_PROVIDER_TYPE | Defines the set of provider types. |
| VSS_RECOVERY_OPTIONS | Used by a requester to specify how a resynchronization operation is to be performed. |
| VSS_RESTORE_TARGET | Defines the set of restore targets. |
| VSS_RESTORE_TYPE | Defines the set of restore operation to be performed. |
| VSS_RESTOREMETHOD_ENUM | Defines the set of default file restore methods for a writer. |
| VSS_ROLLFORWARD_TYPE | Used by a requester to indicate the type of roll-forward operation it is about to perform. |
| VSS_SNAPSHOT_COMPATIBILITY | Defines the set of volume control or file I/O operations that can be disabled for a volume that has been shadow copied. |
| _VSS_SNAPSHOT_CONTEXT | Specifies how a shadow copy is to be created, queried, or deleted and the degree of writer involvement. |
| VSS_SNAPSHOT_STATE | Defines the set of states of a shadow copy operation. |
| VSS_SOURCE_TYPE | Defines the set of types of data that a writer can manage. |
| VSS_SUBSCRIBE_MASK | Defines the set of events that a writer can receive. |
| VSS_USAGE_TYPE | Specifies how the host system uses the data managed by a writer. |
| _VSS_VOLUME_SNAPSHOT_ATTRIBUTES | Defines the set of attributes of a shadow copy. |
| VSS_WRITER_STATE | Defines the set of states of the writer. |
| VSS_WRITERRESTORE_ENUM | Defines the set of conditions under which a writer will handle events generated during a restore operation. |