James Stroud wrote: > py> b.tk.call('bind', 'Listbox', '<B1-Motion>', _) You want b.tk.call('bind', 'Listbox', '<B1-Motion>', "") of course. James -- James Stroud UCLA-DOE Institute for Genomics and Proteomics Box 951570 Los Angeles, CA 90095 http://www.jamesstroud.com