Can a Excel Client call a nusoap server without WSDL?

[Unbreakable]

I am using the nusoap client and nusoap server without any problem.

However, once I change the client to the excel, I am not sure how to
call the nusoap server. Especially the nusoap server only generate
the a SOAP message as follow instead of a WSDL file.

So, my question is

1.) Can I use excel or .Net as a client to call the nusoap server?

2.) If I can, how should I call it in the excel client side?
I am using the follow sentence to call when using the nusoapcleint.
$price = $client->call('lookup', $param,$namespa ce);

Thanks All.
This whole sample was based on apple tutorial.

http://developer.apple.com/internet/webservices/soapphp.html

//THE XML request send to SERVER from Client.
<?xml version="1.0" encoding="ISO-8859-1"?>
<SOAP-ENV:Envelope SOAP-ENV:encodingSty le="http://schemas.xmlsoap .org/soap/encoding/"
xmlns:SOAP-ENV="http://schemas.xmlsoap .org/soap/envelope/"
xmlns:xsd="http ://www.w3.org/2001/XMLSchema"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance"
xmlns:SOAP-ENC="http://schemas.xmlsoap .org/soap/encoding/"
xmlns:si="http://soapinterop.org/xsd">
<SOAP-ENV:Body>
<ns1:lookup xmlns:ns1="urn: xmethods-BNPriceCheck">
<isbn xsi:type="xsd:s tring">111</isbn>
</ns1:lookup>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>


//The XML result return by SERVER to Client.

<?xml version="1.0" encoding="ISO-8859-1"?>
<SOAP-ENV:Envelope SOAP-ENV:encodingSty le="http://schemas.xmlsoap .org/soap/encoding/"
xmlns:SOAP-ENV="http://schemas.xmlsoap .org/soap/envelope/"
xmlns:xsd="http ://www.w3.org/2001/XMLSchema"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance"
xmlns:SOAP-ENC="http://schemas.xmlsoap .org/soap/encoding/"
xmlns:si="http://soapinterop.org/xsd">
<SOAP-ENV:Body>
<ns1:lookupResp onse xmlns:ns1="urn: xmethods-BNPriceCheck">
<return>
<price xsi:type="xsd:s tring">11</price>
<detail xsi:type="xsd:s tring">the 111 book</detail>
</return>
</ns1:lookupRespo nse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>