Re: subfile processing: SFLSIZ=SFLPAG (was: readc & sflnxtchg)

[Bob Larkin <blarkin@xxxxxx>]

david.kahn@gbwsh.mail.abb.com wrote:

> "Simon Coulter" <shc@flybynight.com.au> wrote:
>
> The disappearing selections problem can be solved using arrays of "off the
> subfile" active options and keys but it's messy. If anyone has a more
> elegant solution I'd be enthusiastic to hear it.
>
> Dave Kahn, ABB Steward Ltd.

A simple trick for handling subfiles is two define duplcate subfiles. For a
position to a prior record (Page UP), find the starting record, load the first
page, then read the first subfile by RRN, writeing to subfile B. Simple code to
determine if A or B is the current SFL to use.

Another technique I learned from Harry Hiles was to write duplicates of the
records in a Data Que using APIs. A little cumbersome the first time you write
it, but it is easy to clone, and provides very robust subfile handling.
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