In think you misunderstood me. I don't want the text on the button to change but I actually have a whole hash of Entry Boxes that need to have their information updated. Second, the varname was just an example. posted below is my current code (w/o the extra subroutines to save space)
se strict;
use Tk 800.00;
use Mysql;
require Tk::Frame;
require Tk::TextUndo;
require Tk::Text;
require Tk::Scrollbar;
require Tk::Menu;
require Tk::Menubutton;
require Tk::Adjuster;
require Tk::DialogBox;

# Main Window
my $mw = new MainWindow;
$mw->geometry('800x600');

# Frames Setup
my $lf = $mw->Frame->pack(qw/-side left -fill y/);
my $rf = $mw->Frame->pack(qw/-side right -fill y/);

# Menu Bar Setup
my $mb = $mw->Menu(-menuitems => &menubar_menuitems() );
$mw->configure(-menu => $mb);
$mw->title("INSCO Inventory Control");

#Set Up Serial Query Information
my $label_input   = $lf->Label(-text=>'Serial Number: ',)->pack(qw/-si
+de top/);
my $tf_serial     = $lf->Entry(-width=>30)->pack(qw/-side top/);
my $label_space   = $lf->Label(-text=>'',)->pack(qw/-side top/);
my $returned      = "";

[download]
Right here is where I'm working. 
##Set up query button
my @info;
my $button_submit = $lf->Button(
    -text => 'Search',
    -command => my \@info = \&get_data
)->pack(qw//);
print $info[1];


#Set Up Client Information
my %field;
my @names = (qw/tf_po tf_client tf_contact tf_phone tf_email tf_addres
+s tf_city tf_state tf_zip tf_id tf_model/);
my @sizes = (  30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30);
my @labls = ("PO:", "Client:", "Contact:", "Contact Phone Number:", "C
+ontact Email Address:", "Contact Post Address:", "", "" , "", "Client
+ Specified ID", "Model");
my @pos = (1,2,3,4,5,6,7,8,9,10,11); 
foreach (@names) {
    my $position = shift(@pos);
    $field{$_}{txvar} = '';
    $field{$_}{label} = $rf->Label(
        -text => shift( @labls ))
    ->grid(-row => '$position',
        -col => '0',
    );
    $field{$_}{entry} = $rf->Entry(
        -width => shift( @sizes ),
        -textvariable => '',
    )->grid(-row => '$position',
        -col => '2',
    );
}

# Start the main event loop
MainLoop;

sub get_data {
    my $entered = $tf_serial->get;
    my $dbh = Mysql->connect("host", "database", "username", "********
+") or
        die("Could Not Connect To Server");
    my $query = qq~SELECT * FROM inventory WHERE serial='$entered'~;
    my $sth = $dbh->query($query);
    my @arr = $sth->fetchrow;
    return(@arr);
}

[download]

In reply to Should have explained better by £okì
in thread Tk/Perl Command by £okì

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