IWiaTransferCallback interface

The IWiaTransferCallback interface receives callbacks during a data transfer.

Members

The IWiaTransferCallback interface inherits from the IUnknown interface. IWiaTransferCallback also has these types of members:

The IWiaTransferCallback interface has these methods.

Method	Description
GetNextStream	Gets a new stream for the specified item.
TransferCallback	Provides progress and other notifications during a transfer.

Image processing filter developers should implement this interface and the IWiaImageFilter interface.

The IWiaTransferCallback interface, like all Component Object Model (COM) interfaces, inherits the IUnknown interface methods.

IUnknown Methods	Description
IUnknown::QueryInterface	Returns pointers to supported interfaces.
IUnknown::AddRef	Increments reference count.
IUnknown::Release	Decrements reference count.

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Header	Wia.h
IDL	Wia.idl
Library	Wiaguid.lib