When a control is created, a handle to the control is also created. This handle is a COBOL data item. Its value uniquely identifies
the control to the system. Handle values are generated dynamically at run time and cannot be controlled by the programmer.
Note: If you want to assign a constant name to a control (a name that remains the same between runs), you can assign an ID to the
control. Anytime the runtime system returns information about a control, it includes both its handle and its ID. Because the
handle can change from run to run, examining the ID can be more convenient. Note that using IDs is the only effective way
to distinguish controls in the Screen Section, because those controls' handles are hidden from the programmer.