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  2. RPG400-L
  3. July 2003

Re: Renaming fields in External Data Structures

Overlay should work, but I prefer using pointers, and have
used them in several cases, as follows, using Tim's example
with liberal "embellishment" <g>. The caution is, either the
pointer or the overlay method will only work if the fields
are safely contiguous.

File CLRCKSFM, record CLRCKS04, first check number field
CKNB01.

D InPut04       E DS            ExtName(CLRCKSFM:CLRCKS04)
Inz

D chknbrptr         S       *     Inz( %addr( CKNB01 ))

D chknbr               S     6S 0 Dim(48)
D                                           Based(
chknbrptr )

Don't know about the latest VnRn, but this pointer method
works like a charm for *any* type of field, as long as the
elements are contiguous: packed, integer, whatnot.

-- Alan

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