IUIAutomationStructureChangedEventHandler::HandleStructureChangedEvent method (uiautomationclient.h)

Handles an event that is raised when the Microsoft UI Automation tree structure has changed.

Syntax

HRESULT HandleStructureChangedEvent(
  [in] IUIAutomationElement *sender,
  [in] StructureChangeType  changeType,
  [in] SAFEARRAY            *runtimeId
);

Parameters

[in] sender

Type: IUIAutomationElement*

A pointer to the element that raised the event.

[in] changeType

Type: StructureChangeType

A value indicating the type of tree structure change that took place.

[in] runtimeId

Type: SAFEARRAY*

Receives the runtime identifier of the element. This parameter is used only when changeType is StructureChangeType_ChildRemoved; it is NULL for all other structure-change events.

Return value

Type: HRESULT

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

Remarks

This method is implemented by the application to handle events that it has subscribed to by using AddStructureChangedEventHandler

Adjusting an event handler from within this method is not supported.

Requirements

See also

Best Practices for Using Safe Arrays

IUIAutomationStructureChangedEventHandler