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General Consensus on Variable Cleanup in VBA

• Local variables (declared with Dim inside subs/functions)
• Object variables (for example, Inventor.Application, Documents, etc.)
• Global or module-level variables

You can find documentation for VC++ on Microsoft’s Official Docs Website, Visual Studio Documentation, Visual C++ Blog, these resources will enable you to find comprehensive documentation and information on VC++.

Yes, it’s possible to remove those stale external links even bitmap references using VBA, though it’s a bit nuanced depending on how the link is embedded.

To automatically fill a field with the last open file, you can use the Inventor’s API method CommandManager.PostPrivateEvent with kFileNameEvent type.

To start with Visual Basic you should:

• Download Visual Studio Community Edition.
• Learn and understand the VB syntax and structure.
• Start by creating simple projects.
• Use Microsoft's documentation and tutorial to learn.