How can I receive and send data from Matlab to a Web service?

Hello, I need to receive data of an acquired spectra (counts acquired, it is a big matrix) in Matlab; I have to receive these data from an IP address (I have earlier created a Web service in Labview that acquire and save the data I want in an IP address). Then I also have to send a value calculated in Matlab to the Web service (so that it can be re-sent to Labview). How can I do that? Which function do I have to use? I have read that there are two ways of communicating with Matlab and Web services: 'Soap' functions and 'createClassFromWsdl' function. I don't know which one I should use, and also I don't know which information and parameters (apart from the IP address of course) I have to give to Matlab in order to make the communication work.

Thanks in advance, Silvia

[Walter Roberson]

There is also urlread()