According to the docs, the place method returns an empty string as result.

Which would mean that $res == \"";. Try doing this instead: 

my $listbox;
sub some_name {
  $listbox = $search_frame->ListBox( ... );
  $listbox->place( ... );
}
$listbox->insert( ... );

[download]
Update: $search_frame->ListBox( ... );
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Calling a TK Method by reference by Joost
in thread Calling a TK Method by reference by Popcorn Dave

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