Product : ISaGRAF V3.2
Date : 22 July 1998
File : VXA.What are Variable eXtented Attributes.htm
Subject : What are Variable eXtented Attributes
Keywords: VXA - Variable Extended Attributes
Since 3.21 release, with 'WDK' product (included in IDK), a feature
called 'VXA' is available.
Using WDK source and manual, you may implement a DLL for ISaGRAF
workbench called VXA.DLL.
Each time a variable is declared, copied, modified, saved,
compiled, downloaded to target, a procedure from your VXA.DLL will
Possible implementation of that DLL you may do:
. example 1:
exchanging variables with a supervisor in order to avoid double
declaration : each time a variable is modified in ISaGRAF
dictionary, you may update your supervisor data-base.
. example 2:
defining variables comments in multiple languages : when project
document is printed, you could then select language for variable
. example 3:
associating flags to some variables, build a resource file to link
those flags to your variable identifiers, and download that
resource file to ISaGRAF target within your TIC code.
The last printout of "IDK guide V3.3" contains a
complete chapter describing all VXA DLL functions interface.
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