Okay, Tye, I'll post it. I hope this helps. I'll try to explain the problem more in depth. I have two optionmenus and I want them to interact -- one of them contains directories, the other contains files (certain files connected to that directory).

I created a callback on the option menu that holds the directory, but apart from other problems during testing yesterday, doday I'm getting an error message: Can't use string "string here" as a HASH ref. Here's the code, some things, of course, taken out.

sub generate_options {
...
  opendir(DIR,$_[0]->{base});
  my @subdirs = grep /[Tt][Ss]\d+/, readdir(DIR);
  closedir(DIR);
...
  my $nb = $mw->NoteBook->grid;
...
  for(1..$_[0]->{conds}) {
    $page->[$_-1] = $nb->add("Page$_", -label => "Condition $_")
}

  for(1..$_[0]->{conds}) {
...
    my $dom = $page->[$_-1]->Optionmenu(
                -variable => \$info->{subdir}->[$_-1],
                -options  => [@subdirs],
    );
    my $fom = $page->[$_-1]->Optionmenu(
                -variable => \$info->{file}->[$_-1],
                -options  => get_files
                             ($_[0]->{base},\@subdirs, 0),
    );
# This here is where I get into trouble: $info->{subdir}...
# is spitting out hash ref error described above
    $dom->configure(-command => 
      sub { $fom->configure(-options =>
       get_files($_[0]->{base},$info->{subdir}->[$_-1])) });
    my $b   = $page->[$_-1]->Button(
                -text => "Set",
                -command => [\&record, { info => $info, indx => $_-1 }
+],
    );
...
   $dom->grid( $fom );
...
  }
...
}


sub get_files {
  opendir(DIR,$_[0] . '\\' . $_[1]->[$_[2]]);
  my @files = grep /.txt$/, readdir(DIR);
  closedir(DIR);
  return [@files];
}
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