How to use deferred.when with eventlistner and eventhandler?

How to use deferred.when with eventlistner and eventhandler?

I am trying to use one Deferred.when statement which can return an object
after the completion of an eventhandler. My code looks like something
below. Can someone guide me how to make it work? I am using dojo 1.7.
define(["dojo/_base/declare","dojo/_base/lang", "dojo/_base/xhr",
"dojo/_base/json","dojo/_base/Deferred","dijit/registry","dojo/_base/connect",
"dojo/query","dojo/on","dojo/dom-attr","dojo/dom","dojo/has","dojo/json","dojo/dom-style"],
function(declare,lang,xhr,json,Deferred,registry,connect,$,on,attr,dom,has,json,domStyle)
{
declare("model.Item", [],
{
deferred:null,
item:null,
Load: function(){
this.deferred = new Deferred();
var overlay = registry.byId("readFromStore");
overlay.show();
Deferred.when(connect.connect(registry.byId("storeReadOK"),"onClick",this,this.loadFromStorage),
(return (this.deferred)));
// I want modification for the above line.
}
loadFromStorage:function()
{
// Do something here
this.deferred.callback(this.item);
}
return model.Item;
}
);