Soap Question

Hello,

I was given this:

POST /cart_advanced.asmx HTTP/1.1
Host: api.3dcart.com
Content-Type: application/soap+xml; charset=utf-8
Content-Length: length

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <runQuery xmlns="http://3dcart.com/">
      <storeUrl>string</storeUrl>
      <userKey>string</userKey>
      <sqlStatement>string</sqlStatement>
      <callBackURL>string</callBackURL>
    </runQuery>
  </soap12:Body>
</soap12:Envelope>

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And I am not sure what to do with it, I have used something similar in the past but I would call it with a url string...

The tutorial does not tell how to use it, simply shows the call and the response, the call is what I posted above.

Any tips would be appreciated.

Matt