Is there some way to uniquely identify a project?

[Roland]

I'm writing an add-in and need to know which project the data came from
(otherwise it might display data belonging to the wrong project -- several
may be open at the same time)

 

[Rod Gill]

In standalone project, use the project title. However as this does change
you may need to implement a unique numbering system by adding a number in
say Number of the project summary field.

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Rod Gill
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[Bill Bordiuk]

Add a custom field to the project to identify it. You could use time and
date concatenated with the project name for example. This would avoid
problems with projects with duplicate names. Check the help for
CustomDocumentProperties.