public virtual extern void IUIAutomation3_RemoveFocusChangedEventHandler( [MarshalAs(unmanagedType: UnmanagedType.Interface), In] IUIAutomationFocusChangedEventHandler handler);
public virtual extern void IUIAutomation3_AddFocusChangedEventHandler( [MarshalAs(unmanagedType: UnmanagedType.Interface), In] IUIAutomationCacheRequest cacheRequest, [MarshalAs(unmanagedType: UnmanagedType.Interface), In] IUIAutomationFocusChangedEventHandler handler);