What is the difference between structured and unstructured error handling in VBA?

VBA primarily uses unstructured error handling with `On Error GoTo`, which relies on jumping to labels. Structured error handling, like `Try...Catch...Finally` blocks found in other languages, isn't directly supported in VBA. While you can simulate some aspects of structured error handling using nested `On Error GoTo` statements and strategic use of `Exit Sub/Function`, it's generally less clean and maintainable than true structured error handling.