Typically, to use the AdWords API web services, you would download a toolkit that knows how to interpret WSDL files and how to encode and decode XML request and response messages. When one of the AdWords API services receives a request, it sends back the response as an XML message. The toolkits know how to parse the response and return a data structure or object back to the caller, as appropriate for the language. The exact toolkit you would choose depends on the language you are using. Some toolkits do more for you or work better than others.

The code samples are designed to show you how to interract with AdWords using various SOAP toolkits. These samples are for educational purposes only and are not meant to be used for more complicated tasks. The client libraries and other projects should be used for that purpose.