$VAR1 = {
          'FT' => bless( {
                           'value' => 'Btn',
                           'gennum' => '0',
                           'type' => 'label',
                           'objnum' => '31'
                         }, 'CAM::PDF::Node' ),
          'DA' => bless( {
                           'value' => '/ZaDb 9.0 Tf 1.000 0.660 0.000 0.180 k
',
                           'gennum' => '0',
                           'type' => 'string',
                           'objnum' => '31'
                         }, 'CAM::PDF::Node' )
        };

##</code><code>##

$VAR1 = {
          'FT' => bless( {
                           'value' => 'Btn',
                           'gennum' => '0',
                           'type' => 'label',
                           'objnum' => '31'
                         }, 'CAM::PDF::Node' ),
          'DA' => bless( {
                           'value' => '/ZaDb 9.0 Tf 1.000 0.660 0.000 0.180 k
',
                           'gennum' => '0',
                           'type' => 'string',
                           'objnum' => '31'
                         }, 'CAM::PDF::Node' ),
          'V' => bless( {
                          'gennum' => '0',
                          'value' => 'Yes',
                          'type' => 'label',
                          'objnum' => '31'
                        }, 'CAM::PDF::Node' )
        };

##</code><code>##

#!/usr/bin/perl
# pdf-filler-test.pl
use strict;
use warnings;
use CAM::PDF;
use Data::Dumper;
my $infile  = 'fw9.pdf';
my $outfile = 'modified_fw9.pdf';
my $pdf     = CAM::PDF->new($infile) or die "Cannot open $infile";
my @FIELDS  = $pdf->getFormFieldList();

use Data::Dumper;
foreach my $field ( @FIELDS ) {
    if ($field =~ /^c/) {
        my $ff_obj    = $pdf->getFormField($field);
        my $dict   = $pdf->getFormFieldDict($ff_obj);
        $dict->{V} = CAM::PDF::Node->new('label', 'Yes', $ff_obj->{objnum}, $ff_obj->{gennum});
        print Dumper $dict;
    }
    else {
        $pdf->fillFormFields($field => $field);
    }
}
$pdf->fillFormFields(
        'f1_01(0)' => 'name',
        'f1_02(0)' => 'test',
);
$pdf->cleanoutput($outfile);