error while compiling soap client on vc++

[Rajendra]

    Hi All,
   While compiling following code for soap client on vc++ 6.0,
 Im getting following error "error C2871: 'MSSOAPLib' : does not exist or is
not a namespace".
 There are more errors. i think it's because of above error only.
 Im very new to vc++ and web services.
 Anybody if encountered same problem, pls let me know.
where do im making mistake or do i need to make any settings in vc++
environment.
 Thanks in advance,
 Rajendra.


#include <stdio.h>

#import "msxml4.dll"
using namespace MSXML2;

#import "C:\Program Files\Common Files\MSSoap\Binaries\MSSOAP30.dll" \
         exclude("IStream", "ISequentialStream", "_LARGE_INTEGER", \
               "_ULARGE_INTEGER", "tagSTATSTG", "_FILETIME")
using namespace MSSOAPLib;

void CallService()
{



   ISoapSerializerPtr Serializer;
   ISoapReaderPtr Reader;
   ISoapConnectorPtr Connector;

   // Connect to the service
   Connector.CreateInstance(__uuidof(HttpConnector));
   Connector->Property["EndPointURL"] =
"http://www.allesta.net:51110/webservices/soapx4/isuseronline.php";;
   Connector->Connect();

   // Begin message
   Connector->Property["SoapAction"] = "uri:allesta-YahooUserPing";
   Connector->BeginMessage();

   // Create the SoapSerializer
   Serializer.CreateInstance(__uuidof(SoapSerializer));

   // Connect the serializer to the input stream of the connector
   Serializer->Init(_variant_t((IUnknown*)Connector->InputStream));

   // Build the SOAP Message
   Serializer->startEnvelope("","","");
   Serializer->startBody("");
   Serializer->startElement("isuseronline","uri:allesta-YahooUserPing","","m
");
   Serializer->startElement("username","","","");
   Serializer->writeString("laghari78");
   Serializer->endElement();
   Serializer->endElement();
   Serializer->endBody();
   Serializer->endEnvelope();

   // Send the message to the web service
   Connector->EndMessage();

   // Let us read the response
   Reader.CreateInstance(__uuidof(SoapReader));

   // Connect the reader to the output stream of the connector
   Reader->Load(_variant_t((IUnknown*)Connector->OutputStream), "");

   // Display the result
   printf("Answer: %s\n", (const char *)Reader->RPCResult->text);

}

void main()
{
   CoInitialize(NULL);
   CallService();
   CoUninitialize();
}


*********************************************************
Disclaimer:          

This message (including any attachments) contains 
confidential information intended for a specific 
individual and purpose, and is protected by law. 
If you are not the intended recipient, you should 
delete this message and are hereby notified that 
any disclosure, copying, or distribution of this
message, or the taking of any action based on it, 
is strictly prohibited.

*********************************************************
Visit us at http://www.mahindrabt.com