Passing structures
Structures as arguments behave like simple variables, not like
objects.
Structures passed by value
When you pass a structure by value, PowerBuilder passes a copy of
the structure. You can modify the copy without affecting the
original.
Structures passed by
reference
When you pass a structure by reference, PowerBuilder passes a
reference to the structure. When you changes values in the structure,
you are modifying the original. You will not get a null object
reference, because structures always exist until they go out of
scope.
Structures passed as
read-only
When you pass a structure as read-only, PowerBuilder passes a copy
of the structure. You cannot modify any members of the structure.