foreach (keys %{$dades->[0]}) {
	$feines[0] = $dades->[0]->{$_}->{'client_id'};
	$feines[1] = $dades->[0]->{$_}->{'treb_id'};
	$feines[2] = $dades->[0]->{$_}->{'zona_nom'};
	$feines[3] = $dades->[0]->{$_}->{'feina_desc'};
	$feines[4] = $dades->[0]->{$_}->{'feina_tipus'};
	$feines[5] = $dades->[0]->{$_}->{'status'};
	my $row = $form->{'feines'}->append(@feines);
	my $valor = $dades->[0]->{$_}->{'feina_id'};
	my $tmp = $valor; 
		# If I don't do this, then get_row_data returns an UNKNOWN ref afterwards... weird
	$form->{'feines'}->set_row_data($row, $tmp);
print "Fila $row, valor $tmp\n";
}

[...]

# $event contains the number of the CList row that has been selected, let's say 1.
$glob_rowid = $form->{'feines'}->get_row_data($event);
print "Row $event; Data: $glob_rowid";
print Dumper $glob_rowid;