IVirtualizedItemProvider interface

Applies to Windows and Windows Phone

Exposes a method to support the virtualized item control pattern. Implement this interface in order to support the capabilities that an automation client requests with a GetPattern call and PatternInterface.VirtualizedItem.


public interface IVirtualizedItemProvider




The IVirtualizedItemProvider interface has these types of members:


The IVirtualizedItemProvider interface has these methods. It also inherits methods from the Object class.

Realize Makes the virtual item fully accessible as a UI Automation element.



Controls that contain a large number of child items can use virtualization to efficiently manage the items. With virtualization, the control maintains full information in memory for only a subset of items at any given time. Typically, the subset includes only those items that are currently visible to the user. Full information about the remaining virtualized items is kept in storage and is loaded into memory, or realized, as the control needs it, for example, as new items become visible to the user. For more info on this pattern, see VirtualizedItem Control Pattern.

IVirtualizedItemProvider is implemented by the Windows Runtime automation peer base class ItemAutomationPeer.

The IVirtualizedItemProvider pattern doesn't have a pattern property identifier class, the only API to implement is a method.


Minimum supported client

Windows 8

Minimum supported server

Windows Server 2012

Minimum supported phone

Windows Phone 8.1 [Windows Runtime apps only]


Windows::UI::Xaml::Automation::Provider [C++]



See also

IVirtualizedItemProvider (COM interface)
VirtualizedItem Control Pattern
Custom automation peers



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