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IWiaEventCallback interface (wia_xp.h)

  • Article

The IWiaEventCallback interface is used by applications to receive notification of Windows Image Acquisition (WIA) hardware device events. An application registers itself to receive event notifications by passing a pointer to the IWiaEventCallback interface to the IWiaDevMgr::RegisterEventCallbackInterface method.

Inheritance

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

Methods

The IWiaEventCallback interface has these methods.

 
IWiaEventCallback::ImageEventCallback

The IWiaEventCallback::ImageEventCallback method is invoked by the Windows Image Acquisition (WIA) run-time system when a hardware device event occurs.

Remarks

The IWiaEventCallback 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)