fetching cpc using google adwords api

yes.. i'm trying this sample http://code.google.com/p/google-api-adwords-dotnet/wiki/NoClientLibrary#Getting_an

using the SOAP like this
<soap:envelope
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
="" xmlns="https://adwords.google.com/api/adwords/v8">

<soap:header>
<email>loginemail@youraccount.com
<password>secretpassword</password>
<useragent>Your User Agent description
<developertoken>_developer_token_here_


<soap:body>
<estimatekeywordlist>
<keywordrequests>
<type>Broad
<text>flowers
<maxcpc>50000






we can fetch the info, i want to know that in which web service i can fetch search volume and cpc together?