Accesing parent from the Dialog beforeClose event

Hi
I have created a dialog in a button press event. I have set the event. The beforeClose event of the dialog box gets activated correctly. I tested it by putting a alert box. It works..

My problem is how to access the other controls from the dialog beforeClose Event.

I have the Canvas in which there is a menu bar. When the menu is clicked, the menu is hidden and the dialog is shown. When the dialog is closed the menu bar should be made visible. to access the menubar i need to access the parent / host - right ? So how to access it ?

// The default code is a com class (inherited from linb.Com)
Class('App', 'linb.Com',{
// Ensure that all the value of "key/value pair" does not refer to external variables
Instance:{
// To initialize instance(e.g. properties)
initialize : function(){
// To determine whether or not the com will be destroyed, when the first UI control be destroyed
this.autoDestroy = true;
// To initialize properties
this.properties = {};
window.mainlinb = this;
},
// To initialize internal components (mostly UI controls)
// *** If you're not a skilled, dont modify this function manually ***
iniComponents : function(){
// [[code created by jsLinb UI Builder
var host=this, children=[], append=function(child){children.push(child.get(0))};

append(
(new linb.UI.SLabel)
.setHost(host,"ctl_slabel9")
.setDock("top")
.setCaption("VIL 4 CA")
.setCustomStyle({"KEY":"font-family:georgia,serif;font-size:34pt;font-weight:normal;font-style:italic;text-align:left"})
);

append(
(new linb.UI.MenuBar)
.setHost(host,"mnuBar")
.setItems([{"id":"mnuClient", "sub":[{"id":"mnuClientManager", "caption":"Client Manager"}, {"id":"disabled", "caption":"disabled", "disabled":true}, {"id":"image", "caption":"image", "image":"img/demo.gif"}, {"type":"split"}, {"id":"checkbox 1", "caption":"checkbox 1", "type":"checkbox"}, {"id":"checkbox 2", "caption":"checkbox 2", "type":"checkbox"}], "caption":"Client"}, {"id":"menu2", "sub":[{"id":"sub menu 1", "caption":"sub menu 1", "add":"[Ctrl+F]", "sub":[{"id":"sub 1", "type":"radiobox"}, {"id":"sub 2", "type":"radiobox"}, {"id":"sub 3"}]}, {"id":"sub menu 2", "caption":"sub menu 2", "add":"[Ctrl+T]", "sub":["sub 3", "sub 4"]}], "caption":"menu2"}])
.onMenuSelected("mnuBar_onmenuselected")
);

return children;
// ]]code created by jsLinb UI Builder
},
// Give a chance to load other com
iniExComs : function(com, threadid){
},
// Give a chance to determine which UI controls will be appended to parent container
customAppend : function(parent, subId, left, top){
// "return false" will cause all the internal UI controls will be added to the parent panel
return false;
},
// This instance's events
events : {},
_ctl_sbutton1_onclick : function (profile, e, src, value) {
var uictrl = profile.boxing();
linb.alert("hi","I'm " + uictrl.getAlias());
},
mnuBar_onmenuselected : function (profile, popProfile, item, src) {

var ns = this, uictrl = profile.boxing();
var caption = '';
var modulefile = '';

switch (item.id)
{
case 'mnuClientManager':
caption = 'Client Manager';
modulefile = 'clientmanager.html';
break;
}

ns.mnuBar.setVisibility("hidden",true);
var dlg = new linb.UI.Dialog({caption:caption,status:"max",iframeAutoLoad:modulefile});
dlg.beforeClose(ns.ChildWindow_Closed);
dlg.showModal();
},

ChildWindow_Closed : function(profile)
{
//I dont want to use window.mainling.mnuBar here. How else can i access it ?
window.mainlinb.mnuBar.setVisibility("visible",true);
}

}
});

Thanks