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use Tk;
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$main = MainWindow->new();
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$main->Button( -text => "Click Me!",
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-command => \&display
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)->pack;
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$text1 = $main->Text ('-width'=> 40, '-height' => 2
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)->pack;
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sub display
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{
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$text1->insert('end', "Hello!");
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}
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MainLoop;
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