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Also be aware that most of the VB 2005 compiler flags support an abbreviated version, such as /t rather than /target (you can view all abbreviations by entering vbc / at the command prompt). For example, you can save yourself a few keystrokes by specifying the following: vbc /t:exe TestApp.vb Furthermore, given that the /t:exe flag is the default output used by the VB 2005 compiler, you could also compile TestApp.vb simply by typing vbc TestApp.vb TestApp.exe can now be run from the command line by typing the name of the executable. If all is well, you should see the message Testing! 1, 2, 3 print out to the command window (see Figure 2-1).

Although many see the iPad as a mere laptop replacement, I believe Apple s new tablet was designed with a more ambitious goal: to reinvent mainstream personal computing, much like the original Mac did back in 1984 Apple feels that computers have become far too complicated for the average consumer and aims to simplify the experience Although desktop operating systems like Mac OS X will continue to thrive for years to come, the iPad presents a major paradigm shift in computing The iPad was designed for people who don t like using computers And yet it s packed with enough engineering muscle to easily accommodate the needs of power users In a nutshell, the iPad is the portable, personal computer for everyone The genius of the iPad is in its sheer simplicity.

[ServiceContractAttribute] [OperationContractAttribute] [DataContractAttribute] [DataMemberAttribute]

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Next up, let s examine how to compile an application that makes use of types defined in an external .NET assembly. Speaking of which, just in case you are wondering how the VB 2005 compiler understood your reference to the System.Console type, recall from 1 that mscorlib.dll is automatically referenced during the compilation process. To illustrate the process of referencing external assemblies, let s update the TestApp application to display a Windows Forms message box. Open your TestApp.vb file and modify it as follows: ' A simple VB 2005 application. Imports System ' Add this! Imports System.Windows.Forms Module TestApp Sub Main() Console.WriteLine("Testing! 1, 2, 3") ' Add this! MessageBox.Show("Hello!") End Sub End Module Notice the reference to the System.Windows.Forms namespace via the VB 2005 Imports keyword (introduced in 1). Recall that when you explicitly list the namespaces used within a given *.vb file, you avoid the need to make use of fully qualified names (which can lead to hand cramps).

At the command line, you must inform vbc.exe which assembly contains the imported namespaces. Given that you have made use of the MessageBox class, you must specify the System.Windows. Forms.dll assembly using the /reference flag (which can be abbreviated to /r): vbc /r:System.Windows.Forms.dll testapp.vb If you now rerun your application, you should see what appears in Figure 2-2 in addition to the console output.

Interface, class-level attribute Method-level attribute Class-level attribute Field, property, event-level attribute

The current incarnation of the TestApp.exe application was created using a single *.vb source code file. While it is perfectly permissible to have all of your .NET types defined in a single *.vb file, most projects are composed of multiple *.vb files to keep your code base a bit more flexible. Assume you have authored an additional class (again, using Notepad) contained in a new file named HelloMsg.vb: ' The HelloMessage class Imports System Imports System.Windows.Forms Class HelloMessage Sub Speak() MessageBox.Show("Hello Again") End Sub End Class Assuming you have saved this new file in the same location as your first file (e.g., C:\VbcExample), update your TestApp class to make use of this new type, and comment out the previous Windows Forms logic. Here is the complete update: ' A simple VB 2005 application. Imports System ' Don't need this anymore. ' Imports System.Windows.Forms Module TestApp Sub Main() Console.WriteLine("Testing! 1, 2, 3") ' Don't need this anymore either. ' MessageBox.Show("Hello!") ' Exercise the HelloMessage class! Dim h As New HelloMessage() h.Speak() End Sub End Module

I know I ve mentioned this a few times already, but it is the single most important factor to remember when developing apps for this new device A major component in Apple s strategy to deliver a more organic and intuitive user experience is incorporating real-world metaphors into the interface design process A good example of this is Apple s preinstalled Notes app (see Figure 1 2) A computer newbie could launch the Notes app for the first time and immediately figure out how to use it, without the need for any instructions or prior computer knowledge Your grandparents could use this app! To make the experience fun, Apple even added realistic graphical flourishes, such as the stitched-leather binder that holds both the yellow, lined notepad and the white, card-based notes list.

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