my $cs_e1   = $seg1_f->Entry(-textvariable => \$c_speed[0], -width => 4,
                                                -validate => 'all',
                                                -vcmd  => \&validate_speed,
                                                -font => $med_font)->grid(
                                                -row => 0, -column => 1,
                                                -sticky => "w");

sub validate_speed{
  my $val = shift;
  $val ||= 0;
  #get alphas and punctuation out
  if( $val !~ /^\d+$/ ){ return 0 }
  if (($val >= 0) and ($val <= 10)) {return 1}
    else{ return 0 }
}

##</code><code>##

  $rstring  = <$lfh>;
  ($c_speed[0], $c_speed[1], $c_speed[2], $c_speed[3]) = sscanf("%d %d %d %d", $rstring);