title: How to make a call in Magento to an external web service?
body: <p>I want to call an external web service when user find a product by CatalogSearch. Any idea to do this? I have a SOAP function to call at my ERP, but i don\’t know where i can put this function to call my web service.</p>
  
  <p>Exactly I have a product catalog in my ERP. In Magento users search SKU number in the search input of the header in the Magento catalog search, and i would like to find the product with that SKU in my ERP.</p>
  
  <p>Please help me and sorry for my english,</p>
  
  <p>Thanks,</p>