IUIAutomation3::AddTextEditTextChangedEventHandler method (uiautomationclient.h)
Registers a method that handles programmatic text-edit events.
Syntax
HRESULT AddTextEditTextChangedEventHandler(
[in] IUIAutomationElement *element,
[in] TreeScope scope,
[in] TextEditChangeType textEditChangeType,
[in] IUIAutomationCacheRequest *cacheRequest,
[in] IUIAutomationTextEditTextChangedEventHandler *handler
);
Parameters
[in] element
Type: IUIAutomationElement*
A pointer to the UI Automation element associated with the event handler.
[in] scope
Type: TreeScope
The scope of events to be handled; that is, whether they are on the element itself, or on its ancestors and descendants.
[in] textEditChangeType
Type: TextEditChangeType
The specific change type to listen for. Clients register for each text-edit change type separately, so that the UI Automation system can check for registered listeners at run-time and avoid raising events for particular text-edit changes when there are no listeners.
[in] cacheRequest
Type: IUIAutomationCacheRequest*
A pointer to a cache request, or NULL if no caching is wanted.
[in] handler
Type: IUIAutomationTextEditTextChangedEventHandler*
A pointer to the object that handles the programmatic text-edit event.
Return value
Type: HRESULT
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Remarks
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
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 8.1 [desktop apps only] |
| Minimum supported server | Windows Server 2012 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | uiautomationclient.h (include UIAutomation.h) |
See also
Caching UI Automation Properties and Control Patterns
Conceptual
Reference
RemoveTextEditTextChangedEventHandler