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Visual Basic® .NET by Example by Bob Donald, Gabriel Oancea

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Introduction to Web Services

Web Services are one of the new and exciting features introduced in the .NET Framework. They are a mechanism that allows any client application to call a method on a remote component, residing on a server machine. For example a Web application (page) can invoke a method getStockInfo() on a StockQuote component residing on a different machine to get information about a specific stock. The application would pass in the name of the stock as a parameter to the method and would get back the current value of the stock.

This mechanism is known as Remote Procedure Call (RPC), and it may be familiar to you if you used DCOM or the Remote services in Visual Basic 6. The same principle is used in many other platforms and languages ...

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