There is not currently a script event when saving that you could hook into.
You could use one of the build script events to update a project macro and save the project.
https://kinook.com/VisBuildPro/Manual/scriptevents.htm
https://kinook.com/VisBuildPro/Manua...osproperty.htm
https://kinook.com/VisBuildPro/Manua...savemethod.htm