This VBA (Visual Basic for Applications) construct defines an event procedure within Microsoft Excel. It automatically executes code whenever a cell’s value is modified on a worksheet. The `target` argument represents the cell or range of cells that triggered the change, allowing developers to access and manipulate their properties (e.g., value, address, format) within the subsequent code block. For instance, one could use this to automatically update calculations, validate data entry, or trigger other actions based on cell changes.
This event handler is fundamental for creating dynamic and responsive spreadsheets. It empowers users to build automated workflows, enforce data integrity, and enhance the user experience within Excel. Before event handling, developers relied on less efficient and more complex techniques to achieve similar results. This specific event procedure has become a cornerstone of interactive spreadsheet design since its introduction.
