SOAPClientInvoke is available since version 1.0.
Prototype:
number SOAPClientInvoke(number soap_context, var number soap_response, string url, string action)
Parameters
soap_response
[out] the soap context linked to the response
Description:
Perform a remote action.
Return value:
Return null if succeeded, or an error handle (to get the error text, you should call
SOAPError)