Selects the item matching that matches the given string. If no match is found in the list control, an exn:application:mismatch exception is raised.
In a list box control, all oter items are deselected, even if multiple selections are allowed in the control. See also select in list-box%.
The control's callback procedure is not invoked when this method is called.
The list control's selection can be changed by the user clicking the control, and such changes do not go through this method; use the control callback procedure (provided as an initialization argument) to monitor selection changes.