Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
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) |