You use names to identify columns and other controls in validation rules, filters, PowerScript functions, and DataWindow expression functions.
The DataWindow painter automatically generates names for all controls in a DataWindow object. To name columns, labels, and headings, the DataWindow painter uses database and extended attribute information. To name all other controls, it uses a system of prefixes. You can control the prefixes used for automatic name generation and you can specify the name of any control explicitly.