I am trying to create a new block in my admin panel "Sales->Order->View" Information tab.
In my extension's block folder i have a folder named Adminhtml in this i have file named : Company.php
class Namespace_Modulename_Block_Adminhtml_Company extends Mage_Adminhtml_Block_Sales_Order_Abstract
{
}
In my extension module i have placed this code in config.xml under etc folder
<adminhtml>
<layout>
<updates>
<modulename>
<file>module.xml</file>
</modulename>
</updates>
</layout>
</adminhtml>
then i have my adminhtml layout file as :
<?xml version="1.0"?>
<layout version="0.1.0">
<modulename_adminhtml_company_index>
<reference name="order_info">
<block type="modulename/adminhtml_company" name="modulename" template="company.phtml" />
</reference>
</modulename_adminhtml_company_index>
</layout>
But nothing happened yet,