You can find the WSDL Definition :
http://dedale.eu.org/services/HyperProxy.asmx?wsdl
You can find a service description :
Here is a C++ Sample using gsoap :
This is a GTK# Application which uses HyperProxy to show timetables. Please see : EEE#
The Web Service source code is Open-Source under the GPLv2 license : http://dedale.eu.org/svn/projets/HyperService