之前做了一个VC++访问c#制作的WebService，没有问题，接着我又做了一个VC++访问php制作的WebService ,
结果老是出现Client错误。这个php WebService是用ZendStudio制作的，后来采用NUSoap做php的WebService就没问题。
以下为整个过程：
NUSoap WebService自作.
参考网址：http://blog.csdn.net/raining_peidx/archive/2009/07/27/4384600.aspx
1.php WebService 文件： nusoap_server3.php，以下为代码：

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<?php
require_once("lib/nusoap.php");
function AddNumbers($NumberOne,$NumberTwo)
{

return $NumberOne+$NumberTwo;

}
$soap = new soap_server;
// 初始化对 WSDL 的支持
$soap->configureWSDL('AddNumbers');
// 注册服务
$soap->register('AddNumbers',
array("NumberOne"=>"xsd:int","NumberTwo"=>"xsd:int"),
array("retrun"=>"xsd:int")
);
$HTTP_RAW_POST_DATA = isset($HTTP_RAW_POST_DATA) ? $HTTP_RAW_POST_DATA : '';
$soap->service($HTTP_RAW_POST_DATA);
?>
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2.VC客户端制作，以下是控制台应用程序制作。

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include "stdafx.h"

include

include

//先导入msxml4.dll，再导入mssoap30.dll

import "msxml4.dll"

import "C:Program FilesCommon FilesMSSoapBinariesmssoap30.dll" \

exclude("IStream", "IErrorInfo", "ISequentialStream", "_LARGE_INTEGER", \
"_ULARGE_INTEGER", "tagSTATSTG", "_FILETIME")

using namespace MSXML2;
using namespace MSSOAPLib30;

void Add(int No1,int No2)

{

//char *_itoa( int value, char *string, int radix );

char str1[10],str2[10];

itoa(No1,str1,10); itoa(No2,str2,10);

ISoapSerializerPtr Serializer;

ISoapReaderPtr Reader;

ISoapConnectorPtr Connector;    

// Connect to the service.

Connector.CreateInstance(__uuidof(HttpConnector30));   

Connector->Property["EndPointURL"] = "http://localhost/test/nusoap/nusoap_server3.php";  
Connector->Connect();

//Connector->Property["SoapAction"] = "http://Fantasy/WebServiceDemo/AddNumbers";
Connector->Property["SoapAction"] = "http://localhost/test/nusoap/nusoap_server3.php/AddNumbers";
Connector->BeginMessage();      

// Create the SoapSerializer object.

Serializer.CreateInstance(__uuidof(SoapSerializer30));

// Connect the serializer object to the input stream of the connector object.

Serializer->Init(_variant_t((IUnknown*)Connector->InputStream));

// Build the SOAP Message.

Serializer->StartEnvelope("","","");

//这里可以添加SoapHeader验证代码：

/*

Serializer->StartHeader("");

Serializer->StartHeaderElement("MyHeader","http://Fantasy/WebServiceDemo/",0,"","NONE","");   

Serializer->StartElement("UserName","","","");//填充参数2则出错。

Serializer->WriteString(_bstr_t(userName));

*/

Serializer->StartBody("");   

//Serializer->StartElement("AddNumbers"," http://localhost/test/soap/Server.php/","","");
//Serializer->StartElement("AddNumbers","http://Fantasy/WebServiceDemo/","","");
Serializer->StartElement("AddNumbers","","","");

//(第三个参数可有可无，若加上第二个参数出错！？)

Serializer->StartElement("NumberOne","","","");// NumberOne=

Serializer->WriteString((_bstr_t)str1);

Serializer->EndElement();      

Serializer->StartElement("NumberTwo","","","");// NumberOne= 

Serializer->WriteString((_bstr_t)str2);

Serializer->EndElement();

Serializer->EndElement();  

//

Serializer->EndBody();

Serializer->EndEnvelope();

// Send the message to the XML Web service.   

Connector->EndMessage();   

// Read the response. 

Reader.CreateInstance(__uuidof(SoapReader30));    

// Connect the reader to the output stream of the connector object.  

Reader->Load(_variant_t((IUnknown*)Connector->OutputStream), "");    

// Display the result.

printf("Answer = %s\n", (const char*)Reader->RpcResult->text);  

}

int main()

{

CoInitialize(NULL);   

Add(1211,21114);  

CoUninitialize();

return 0;

}
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注意：此方法只对NUSOAP制作的WebService有效，对zendStudio制作的WebService无效。