Real World XML Web Services: For VB and VB .NET Developers

8.1. Defining Interfaces

The first step in interface-based programming is to define the interfaces you want to implement. When you build a Web service, you should always start with defining the interface. Today, tools like Visual Studio .NET do not provide direct support for this. I am hopeful that future versions will provide the needed support for defining Web service interfaces.

Although you can use Notepad to create a WSDL document from scratch, you'll probably want a more productive and less error-prone way to define your interfaces. An easy way to define a Web service interface is to create a Web service and define the Web methods you want the interface to have. If you have parameters with complex types, you define those types in schemas, ...