did u mean sending vraiables's content [text in text inputs]
to another file [ php almost ] ?
if yes then the button send or whatever's action should be :
on (release) {
form.loadVariables("targetfile.extension", "POST");
}
target file is the php or the other file you are planing to send variables's content to
and that is called loadVariables through the flash form sending all variables saved in that form to target using the post method.
cheers,