# encode string $code as codabar image $bar
my $bar = makebarcode ($code);  # Working! Thank you!

# Place it at x,y page coordinates with scale and frame options.
# Doesn't work. 
$gfx->barcode($bar, $x, $y, $scale, $frame);

# Don't work neither.
$gfx->xo_codabar($bar, $x, $y, $scale, $frame)