Pass information from Observer via session

Step 1:

            Mage::dispatchEvent('my_event');

Step 2:
link method MyEvent to event “my_event” in your module’s config.xml file
Observer.php

    public function MyEvent(Varien_Event_Observer $observer) {
            Mage::getSingleton('customer/session')->setData('my_event', 'results');
    }
}

Step 3:

$result = Mage::getSingleton('customer/session')->getData('my_event'));

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