Determines the next sibling of a dialog element in the parent/child hierarchy. A SUCCESSOR refers to the next created dialog element on the same level (with the same PARENT). You can use this attribute to go through all dialog elements in one parent dialog or dialog element.

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 / handle value of the successor