IEnumWiaItem interface (wia_xp.h)
The IEnumWiaItem interface is used by applications to enumerate IWiaItem objects in the tree's current folder. The Windows Image Acquisition (WIA) run-time system represents every WIA hardware device to applications as a hierarchical tree of IWiaItem objects.
Inheritance
The IEnumWiaItem interface inherits from the IUnknown interface. IEnumWiaItem also has these types of members:
Methods
The IEnumWiaItem interface has these methods.
| IEnumWiaItem::Clone The IEnumWiaItem::Clone method creates an additional instance of the IEnumWiaItem interface and sends back a pointer to it. |
| IEnumWiaItem::GetCount The IEnumWiaItem::GetCount method returns the number of elements stored by this enumerator. |
| IEnumWiaItem::Next The IEnumWiaItem::Next method fills an array of pointers to IWiaItem interfaces. |
| IEnumWiaItem::Reset The IEnumWiaItem::Reset method is used by applications to restart the enumeration of item information. |
| IEnumWiaItem::Skip The IEnumWiaItem::Skip method skips the specified number of items during an enumeration of available IWiaItem objects. |
Remarks
The IEnumWiaItem interface is a specific implementation for WIA of the standard Component Object Model (COM) enumeration interface. For details, see IEnumXXXX.
Applications obtain a pointer to the IEnumWiaItem interface by invoking the IWiaItem::EnumChildItems method.
The IEnumWiaItem interface, like all 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) |
See also
Conceptual
Other Resources
Reference
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