Implement a webservice starting from a WSDL

[Smetje]

At the moment i have to forget C++ and start developping in C#,
specific starting form scratch with WebServices,

The project:
Our company has a partnership to exchange data through WebService with another company. I have to make a webservice that connects to an existant websevice and give my url to that webservice, when this is done the existant webservice will send in periods information to my webservice.

As usal i started with an easy pratical example,

1)Make new website
2)Implement web methods
3)Create windows form
4)Add Web reference to windows form
5)Make instance of service class
6)Call webmethods

This went well, but how do i create a webservice that connects to another, the only thing that i get from the company is a WSDL file,

Many thanks