Magento: Loading attributes per store

I have a custom module that exports data to our fulfillment system when the user checks out. Be开发者_高级运维fore export I need to run the address through a verification service. Since we are charged for this service, I need to configure the user name and password for the service per store. I have added the attributes I need, however I cannot figure out how to load them per store. How can I tell my resource model to load based off the store?

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How have you added them? It strikes me that they'd be perfect candidates for config values, and Magento wraps the whole per-store-setting thing there really well - take a look in a system.xml file for one of the built-in modules (or a downloaded one...they tend to be simpler) and how it builds the fields up and specifies at what 'scope' (global, store, store-view) settings can be applied.

Then you can access the values from your code with Mage::getStoreConfigValue('your/config/key') and it will give you the correct value for the scope you're in, or the default if you haven't set one for a particular store.