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IArchiveUpdateCallback ​

Update callback is used in IOutArchive::UpdateItems. It defines the following methods:

GetUpdateItemInfo ​

C++
HRESULT GetUpdateItemInfo(
    UInt32 index,
    Int32 *newData,
    Int32 *newProps,
    UInt32 *indexInArchive
)
HRESULT GetUpdateItemInfo(
    UInt32 index,
    Int32 *newData,
    Int32 *newProps,
    UInt32 *indexInArchive
)

Use this method to get information about updated items.

[in] index

The index of the item. Starts from 0 up to the numOrItems passed to IOutArchive::UpdateItems.

[out] newData

This flag indicates whether the item contains new data. 0 means that the item does not contain new data. 1 means that the item contains new data.

[out] newProps

This flag indicates whether the item contains new properties. 0 means that the item does not contain new properties. 1 means that the item contains new properties.

[out] indexInArchive

The index of the item in the archive. If this value in -1 then item is a new one and should be added to archive, otherwise existing item should be updated.

GetProperty ​

C++
HRESULT GetProperty(
    UInt32 index,
    PROPID propID,
    PROPVARIANT *value
)
HRESULT GetProperty(
    UInt32 index,
    PROPID propID,
    PROPVARIANT *value
)

In case of the newProps==1 use this method to get properties of the item in the archive.

[in] index

The index of the item to update. Starts from 0 up to the numOrItems passed to IOutArchive::UpdateItems.

[in] propID

The property ID. See props defined in ProgID.h for details.

[out] value

The value of the property to set.

GetStream ​

C++
HRESULT GetStream(
    UInt32 index,
    ISequentialInStream **inStream
)
HRESULT GetStream(
    UInt32 index,
    ISequentialInStream **inStream
)

In case of newData==1 use this method to get the stream of the item in the archive.

[in] index

The index of the item to update. Starts from 0 up to the numOrItems passed to IOutArchive::UpdateItems.

[out] inStream

Input stream that can be used to read the data of the item.

SetOperationResult ​

C++
HRESULT SetOperationResult(
    Int32 operationResult
)
HRESULT SetOperationResult(
    Int32 operationResult
)

Optionally, this method can be used to report back the progress of the update operation.

[in] operationResult

Int value used to report progress of the operation.