Find root category of store

Question

I am using Magento ver1.6.1. I need to get the root category of a store. I search in google by didn't get any good idea/code. Let me know how to get the root category of a store?

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Mage::app()->getStore()->getRootCategoryId()

The above code gives the default root category, but I need the category Id which we select during store creation.

Answer 1

have you tried:

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Mage::app()->getStore($storeId)->getRootCategoryId();