I have my custom module with magento 1.7 which has configuration page in checkout tab in admin panel. I have different fields like text,textarea,select on form. I want to get these values when I click on 'Save Config' button. Although I Have helpers and models of my module. But I'm not getting understand how/what to make a new helper/model file and what function will be to get these field values after clicking on 'Save Config' button. I have system.xml file of my module.
Thanks a lot