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public class Form1: SystemWindowsFormsForm
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The second way is by using the Inheritance Picker From the menus, select File | Add New Item You will see the Add New Item dialog box displayed in Figure 18-14 Choose Inherited Form from the right-hand pane You will be presented with the Inheritance Picker window (see Figure 18-15) In the Inheritance Picker, find the form that you have stored as a base form (click on the Browse button to search for it), and then click OK This will cause a new form to be created, and the code behind it will include something like this line, depending on which form you picked:
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public class Form2: VideoCollectionForm1
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In our case, we chose the first form that we created for our college application, and the code demonstrates that the inheritance will be from Form (the original base class) to Form1 (our template) to Form2 (the new form)
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Figure 18-14 The Add New Item dialog box
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18: Introduction to Windows Forms
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Figure 18-15 The Inheritance Picker
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EXAM TIP Be sure to understand and work with both methods of creating a form Visual inheritance is a topic covered on the Windows exam
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Imagine the time you can save by implementing visual inheritance The whole goal behind an object-oriented language is to eliminate duplication of effort By creating a library of template forms and selecting them as base classes for your new applications, you will reduce the amount of time you spend coding your application and can spend more time on designing and testing Before we leave this subject, though, we must comment on the visual display of the new form Examine the form shown in Figure 18-16 This form was created via the Inheritance Picker Notice the funny looking characters beside every control These are called glyphs, and when you select them, you see the border (as in Figure 18-16) that indicates that the control has been inherited The color of the border will tell you what kind of security has been applied to the control Each level of access permissions shows a different shade of gray Grey border with no sizing handles This means that the control is a read-only control You will notice from Figure 18-16 that the properties are grayed out You, as the user of the inherited control, cannot make any changes to its properties You will not be able to move or size it either This occurs when a control is specified with Private access modifiers Standard border with sizing handles If a control is specified with either Public or Protected modifiers, you will be able to size and move it
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PART IV
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Localizing Your Form
There will be times when your form will need to be used in a different country or in a different language In order to accommodate that, you need to build localization into your
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Figure 18-16
The newly inherited form
project Localization is the process of translating the resources of your application into a different language In case you were starting to panic, there s no need To accomplish localization within Visual Studio NET, you do the following: 1 Set the form s Localizable property to True 2 Change the Language property to the new language Let s change our Hello World form to provide French and Spanish translations Here are the steps: 1 Set the form s Localizable property to True 2 Change the Language property of the form to French (Canada) 3 Change the button s Text property to Bonjour le Monde 4 Change the Language property of the form to Spanish (Mexico) 5 Alter the button s Text property to Hola Mundo 6 Save and build the solution Figure 18-17 illustrates the effect of changing the button s Text property for the Spanish translation Look under the Solution Explorer, and you will see additional
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