Used in particular event handlers for list view and tree view controls in order to determine the item that caused the event to be raised.

The following table indicates the events for which this attribute is set:

Event	Interpretation
Activate Event	Item being activated, or NULL-HANDLE in the case of MULTI-SELECTION controls.
After-Edit Event	Item whose label has just been edited.
Before-Edit Event	Item whose label the user is attempting to edit.
Check Event	Item that is being checked or unchecked.
Click Event	Item that is being selected or deselected.
Collapse Event	Tree view item that is being collapsed.
Expand Event	Tree view item that is being expanded.

For more information, please refer to the articles Working with List View Controls and Working with Tree View Controls.

Applies to	List view control, tree view control.
Data Type	HANDLE
Default Value	NULL-HANDLE
Possible Values	NULL-HANDLE / handle of list view item or tree view item.