sendAndLoad will put received variables (if output from server is like "&a=3&b=9") to object specified as second argument. AFAIK specified object should be type of LoadVars().
For example:
var result_lv:LoadVars = new LoadVars();
var send_lv:LoadVars = new LoadVars();
send_lv.sendAndLoad( ...url... , result_lv , "POST");
result_lv.onLoad = function(success:Boolean)
{
if (success)
{
... retreive received variables here from result_lv
I don't know why i can't put comments.
It's asynchronous, onLoad function will just be called after response from server
...url... it's just url like "http://mydomain.com/myfile.php"