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IUIAutomation::AddPropertyChangedEventHandlerNativeArray method

Registers a method that handles property-changed events.

Note  Before implementing an event handler, you should be familiar with the threading issues described in Understanding Threading Issues.

Syntax


HRESULT AddPropertyChangedEventHandlerNativeArray(
  [in]  IUIAutomationElement *element,
  [in]  TreeScope scope,
  [in]  IUIAutomationCacheRequest *cacheRequest,
  [in]  IUIAutomationPropertyChangedEventHandler *handler,
  [in]  PROPERTYID *propertyArray,
  [in]  int propertyCount
);

Parameters

element [in]

Type: IUIAutomationElement*

A pointer to the UI Automation element associated with the event handler.

scope [in]

Type: TreeScope

The scope of events to be handled; that is, whether they are on the element itself, or on its ancestors and children.

cacheRequest [in]

Type: IUIAutomationCacheRequest*

A pointer to a cache request, or NULL if no caching is wanted.

handler [in]

Type: IUIAutomationPropertyChangedEventHandler*

A pointer to the object that handles the event.

propertyArray [in]

Type: PROPERTYID*

A pointer to the identifiers of the UI Automation properties of interest. For a list of property IDs, see Property Identifiers.

propertyCount [in]

Type: int

The number of property identifiers in propertyArray.

Return value

Type: HRESULT

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

Remarks

The UI item specified by element might not support the properties specified by the propertyArray parameter.

This method serves the same purpose as IUIAutomation::AddPropertyChangedEventHandler, but takes a normal array of property identifiers instead of a SAFEARRAY.

A UI Automation client should not use multiple threads to add or remove event handlers. Unexpected behavior can result if one event handler is being added or removed while another is being added or removed in the same client process.

Requirements

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]

Header

UIAutomationClient.h (include UIAutomation.h)

IDL

UIAutomationClient.idl

See also

Reference
AddPropertyChangedEventHandler
IUIAutomation
RemoveAllEventHandlers
RemovePropertyChangedEventHandler
Conceptual
Caching UI Automation Properties and Control Patterns
Subscribing to UI Automation Events
Understanding Threading Issues

 

 

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