从输入框获取输入,插入到文本框

#!/usr/local/bin/perl
use Tk;
my $mw = new MainWindow; # Main Window
my $frm_name = $mw -> Frame() -> pack();
my $lab = $frm_name -> Label(-text=>"Name:") -> pack();
my $ent = $frm_name -> Entry() -> pack();
my $but = $mw -> Button(-text=>"Push Me", -command =>&push_button) -> pack();
#Text Area
my $txt = $mw -> Text(-width=>40, -height=>10) -> pack();
MainLoop;
#This function will be executed when the button is pushed
sub push_button {

##从输入框获取输入,
my $name = $ent -> get();
##从输入框获取输入，插入到文本框
$txt -> insert('end',"Hello, $name");
}