The message box is called modal. A window or a form is modal if it retains the focus until you explicitly close it. It's a common practice to make dialog boxes and messages modal, since you want to make sure the user reads the message before he or she continues working with the application.

The show() method belongs to the class MessageBox, of the System.Windows.Forms namespace. Import this namespace before you work with the MessageBox class, so you don't have to specify the fully-qualified name. As print and System.Console are available only from JScript .NET code that is compiled and run from the command line, so is the System.Windows.Forms namespace. It is not available from ASP.NET pages or from Code Behind JScript .NET code.

To learn more about JScript .NET and ASP.NET, go to Column 116, JScript .NET, Part IX: Displaying Information.

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