XmListDeselectItem - A List function that deselects the specified item from the selected list
#include <Xm/List.h>
void XmListDeselectItem (widget, item)
Widget widget;
XmString item;
XmListDeselectItem unhighlights and removes from the selected list the first item in the list that matches item.
For a complete definition of List and its associated resources, see XmList(3X).