1. A method in an operating system for resizing an operating system interface element containing controls, the controls being defined by control definitions stored in a memory, the method comprising the steps of: receiving a command to resize said interface element; responsively to said step of receiving, defining resizable regions of said interface element responsively to said control definitions; resizing said interface element responsively to a result of said step of defining, whereby said interface element is resized by resizing only said resizable regions of said interface element.