IUIAutomation::GetRootElementBuildCache method

Retrieves the UI Automation element that represents the desktop, prefetches the requested properties and control patterns, and stores the prefetched items in the cache.


HRESULT GetRootElementBuildCache(
  IUIAutomationCacheRequest *cacheRequest,
  IUIAutomationElement      **root



Type: IUIAutomationCacheRequest*

A pointer to the cache request, which specifies the properties and control patterns to store in the cache.


Type: IUIAutomationElement**

Receives a pointer to the UI Automation element.

Return Value


If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.


You can use the root element as a starting point for finding other elements, using the FindAll and FindFirst methods.

When searching from the root element, be sure to specify TreeScope_Children in the scope of the search, not TreeScope_Descendants. A search through the entire subtree of the desktop could iterate through thousands of items and lead to a stack overflow.


Minimum supported client Windows 7, Windows Vista with SP2 and Platform Update for Windows Vista, Windows XP with SP3 and Platform Update for Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 R2, Windows Server 2008 with SP2 and Platform Update for Windows Server 2008, Windows Server 2003 with SP2 and Platform Update for Windows Server 2008 [desktop apps only]
Target Platform Windows
Header uiautomationclient.h (include UIAutomation.h)

See Also