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Provides an application callback mechanism during data transfers from Windows Image Acquisition (WIA) hardware devices to applications.
Note For Windows Vista applications, use IWiaTransferCallback instead of IWiaDataCallback.
Inheritance
The IWiaDataCallback interface inherits from the IUnknown interface. IWiaDataCallback also has these types of members:
Methods
The IWiaDataCallback interface has these methods.
| IWiaDataCallback::BandedDataCallback Provides data transfer status notifications. Windows Image Acquisition (WIA) data transfer methods of the IWiaDataTransfer interface periodically call this method. |
Remarks
The IWiaDataCallback 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. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional, Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | wia_xp.h (include Wia.h) |