GetUXIndex() is a user defined function for Excel— written in VBScript—that automatically creates and maintains a numeric outline based on cell indentation. — Intro Whenever I create a content inventory or a work-breakdown structure using Excel, I always include a numeric outline (e.g., 1.2.3.0) in the first column. The outline number provides a flexible and extensible reference model that helps keep track of individual pieces of content and individual tasks.