Contains the handle of the dialog element's last child dialog element, or NULL-HANDLE if the dialog element has no children. You can use this attribute in conjunction with the PREDECESSOR and PARENT attributes to traverse the parent/child hierarchy in the reverse direction.

Applies to	Date/time picker control, dialogs (all types) and all dialog elements, image control, image list control, list view column, list view control, list view item, progress bar control, slider control, spin control, tree view control, tree view item.
Data Type	HANDLE
Default Value	NULL-HANDLE
Possible Values	NULL-HANDLE (no child existing) / any dialog element handle.