using the signal_connect_object() method

[Rob Benton <rob benton conwaycorp net>]

Hey I have a question about the signal_connect_object() method.  On the 
gtk-perl homepage all I can find about this method is that the 3rd 
argument is supposed to be a slot_object.  What exactly is that?  I've 
been able to use that function in C on just a regular gtk widget.  But I 
must be missing something in perl.

I have a textbox I want updated when I press a button.

$button->signal_connect_object( 'clicked', \&update_text, $textbox);

the code above gives me this error:

Can't call method "Gtk::Text=HASH(0x828dd6c)" on unblessed reference at 
/usr/lib/perl5/Gtk.pm line 199