MACROMEDIA FLASH MX 2004-ACTIONSCRIPT LANGUAGE Reference page 702

}
}
}
}
}
// If addPage() was successful at least once, print the spooled pages.
if (pageCount > 0){
my_pj.send();
}
delete my_pj;
}
See also
PrintJob.send(),
702 Chapter 2: ActionScript Language Reference
PrintJob.start()