You have bound probably not the exact thing you wanted. This binds button release for button one (left button) and two (middle button). Try 
$list_box->bind('<Button-1>',
                sub {
                  my $indx = $list_box->curselection();
                  my $selected_object = $list_box->get($indx);
                });
$list_box->bind('<Double-Button-1>', 
                sub{
                  print “\nuser clicked twice”;
                });

[download]
All of this good event binder information is in perldoc Tk::bind.

In reply to Re: Binding mouse clicks in perl/Tk by ichimunki
in thread Binding mouse clicks in perl/Tk by blackadder

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