Declaring Variable for Combobox components?

I have been given so much help on this subject -
But today I’m asking for one last piece of the combobox puzzle!!

How do I declare my variable to be used with my combobox so the data/var is made available to my php script?

I have supplied my combobox variable via components - NOT actionscript.

My combobox is driven by the follwing code:

var myListener:Object = new Object();
combo_cb.addEventListener(“change”, myListener);
myListener.change = function(evt){
_root.cb_entry =;


I know my php works - it’s just a matter of declaring the variable in as2.

_root.cb_entry = “”;

doesn’t work.
Any suggestions?