Help creating Web Methods for a SOAP HL7 Receiver

I am configuring a SOAP HL7 Receiver to handle HL7 Query messages.

I have set up a new class based on EnsLib.SOAP.Service and configured (correctly I hope) the parameters needed.  I have also amended the OnProcessInput Method skeleton provide to send messages on to the Business Process needed.

I am struggling to work out what is needed in the Web Methods and how to create them. 

Any help with this would be much appreciated especially examples that I can adapt for what I need.

Many thanks