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Passing structures – PB Docs 126 – PowerBuilder Library

Passing structures – PB Docs 126

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.


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