How to add a Plugins ?

[Oxii]

here is my map initialization :

Ext.define('App.Map', {        
extend: 'GeoExt.panel.Map',        
alias: 'widget.themap',        
initComponent: function () {           
var me = this;            
Ext.apply(me, {               
 map: map,           
 });        
me.callParent(arguments);    }});

then add map to mapPanel:

Ext.getCmp('mapPanel').add({requires: ['App.Map'], items: [{xtype: 'themap'  }] });

now I want to use the extent polygon here in this example:http://geoext.github.com/geoext2/exa...nt-extent.html
on my mapPanel, not generating a new one.
I am not sure how/where I have to add the plugin property ??

[scottmartin]

Duplicate post:
http://www.sencha.com/forum/showthread.php?243535

Scott.