[S] DDE with S-PLUS 4.0

Prof Brian Ripley (ripley@stats.ox.ac.uk)
Sun, 15 Feb 1998 21:52:26 +0000 (GMT)

Has any of you had successful experiences with DDE with S-PLUS 4.0
to send commands and return the answers, that is using DDE request with
topic = Scommand as in chapter 14 of the 4.0 Programmer's Guide?

I am having problems with all of a VC++ DDE client, a Perl 5.004 client
and the supplied VB client SHOME\samples\DDE\...

Each sort of works but

- The results of graphic commands are not usually completed until the next
such command,
- The return spawns an MS-DOS windows that sometimes gets stuck minimized,
and the return of data only completes when that window is opened.
- The returned data has newlines replaced by tabs, although it is
documented to be `an array of text strings'.

I thought it was my lack of knowledge of DDE parameters, but as the
MathSoft client also has problems I'm wondering if this can be made to
work. DDE execute works perfectly well, but I need a record of the

I'm using S-PLUS 4.0 rel 3 on Win95. Any help will be gratefully
received. As this is a very specialised topic, please email me and I will

Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595
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