title: Blank value in web service for Int64 type
body: <p>I consume a web service that has a numeric element. The Delphi wsdl importer sets it up as Int64.</p>
  
  <p>The web service allows this element to be blank. However, because it is defined as Int64, when I consume the web service in Delphi without setting a value for it, it defaults to 0 because it's an Int64. But I need it to be blank and the web service will not accept a value of 0 (0 is defined as invalid and returns an error by the web service). </p>
  
  <p>How can I pass a blank value if the type is Int64?</p>