IWiaDataCallback interface (wia_xp.h)

  • Article

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)