Hello Jacques,
If you are able to determine automatically which one is the master application on your diagram (and I think you are considering that you already wrote a macro to do it) , you should consider creating a calculated MetaAttribute on the Diagramme MetaClass. This MetaAttribute would be automatically filled with the name (or the absolute identifier) of the master application if it exists (using the macro you already wrote)... It would then be easy to get this value in any macros.
To do so, create a new MetaAttribute (called MASTER Application for example...) on the Diagram MetaClass.
Update its _AtNature to "Virtual" and Permission to "0x20F" (meaning you checked the "Activer la spécification par l'IHM" as shown in below screenshot) --> this last point is to disable modification of this metaAttribute (only your macro will modify it) :
Then create a macro linked tp your new metaAttribute and implement it this way :
'MegaContext(Fields,Types)
'To Implement if you want to have a computed value for this attribute
Sub GetAttributeValue(myDiagram as MegaObject,AttributeID as Variant,Value as String)
Value = ""
For each objApplication in myDiagram.getCollection("~0sUip9B5iid0[Application]")
If <your condition to find the master application> Then
value = objApplication.getProp("~310000000D00[Identifiant absolu]") 'or the name, or ...
exit sub
end If
Next
End Sub
If you do not like/want this solution, you still have the possibility to create, as you mentioned, a specific text file where you would store the information. You could either use one global text file storing the information for all your diagrams, or many temporary text files, one for each diagram, with a specific name for each ones to know where to look for the information.
