Product : ISaGRAF NT target v3.2x
Date : 28-February-1997
File : NTDDE.Exact format of DDE messages returned by server .htm
Subject : Exact format of the DDE messages returned by the server
Keywords: NT target - DDE - DDE message
Following is the exact format of the DDE messages:
ISaGRAF variables types DDE string
BOOLEAN - for the version 3.20 :"TRUE" or "FALSE"
- since the version 3.21: "1" (for TRUE) or "0" (for FALSE)
ANALOG integer integer is converted in a string with %d in a
ANALOG float float is converted in a string with %G in a
TIMER - for version 3.20 : timers are converted in a
string with %dH%dmin%ds%d in the sprintf function.
- since version 3.21 :the timer values are
expressed in milliseconds without units,
MESSAGE - for the version 3.20 : it is not yet implemented
on V3.20, ISaGRAF DDE Server always answer "/".
- since the version 3.21 : the messages are
expressed as C strings
(i.e. zero terminated strings)
These formats are in the ISaDDE\DDE.C file of the source files of the
target in the 'ReqVaRequest' function.
ICS Triplex ISaGRAF Inc. may change these formats.
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