How to set Error and success message in magento

Hello  Friends,

You can set error and success message in magento through the following code

Mage::getSingleton('core/session')->addSuccess(Mage::helper('module_name')->__('Please Type Your Success Message'));

Mage::getSingleton('core/session')->addError(Mage::helper('module_name')->__('Please Type Your Error Message'));

Now Code for display error and success message on phtml


<div id="message">
   <?php echo $this->getMessagesBlock()->getGroupedHtml() ?>
</div>


I hope this post helpful to all my needed friends...