$self->ConfigSpecs(
        -background => [['DESCENDANTS', 'SELF'], 'background', 'Background',   undef],
        -command    => ['CALLBACK',              'command',    'Command',  \&button1],
        -iheight    => ['PASSIVE',               'iheight',    'Iheight',         32],
        -images     => ['PASSIVE',               'images',     'Images',       undef],
        -ilabels    => ['PASSIVE',               'ilabels',    'Ilabels',          1],
        -scrollbars => ['PASSIVE',               'scrollbars', 'Scrollbars',  'osow'],
        -iwidth     => ['PASSIVE',               'iwidth',     'Iwidth',          32],#
        -cols       => [ 'PASSIVE',                 'cols',       'Columns',          1 ],
    );