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MCAD/MCSD Visual C# NET Certification All-in-One Exam Guide
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Figure 24-12
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Setting the help properties
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When you run the application now, you will see the Help button ( ) in the top right corner (see Figure 24-13) When you click the Help button, it displays a large questionmark symbol The user can then move the question mark over the desired control (in
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24: Configuring a Windows Application
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PART IV
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Figure 24-13
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The Help button
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this example, the Add New Student button) and click the button The HelpString text will be displayed EXAM TIP Do not forget to set the MaximizeBox and MinimizeBox to False; otherwise the Help button will not appear
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The MainMenu control can be used to add menus to your application Double-click on the MainMenu control in the Toolbox, and the menu will be added to your form Type in the spaces provided to show the menu items In the example shown in Figure 24-14, we have added a File and a Help menu to the form You will then need to add the following code to the form:
private void menuItemx_Click (object sender, SystemEventArgs e) { HelpShowHelp (this, HelpProviderHelpNamespace); }
MCAD/MCSD Visual C# NET Certification All-in-One Exam Guide
Figure 24-14
Adding menus to a form
The HelpNamespace object identifies the location of the help file This could be in the form of a URL or a local file
Adding Accessibility Features
Another way of adding user assistance to your application is to provide accommodation for the accessibility needs of your users This can include assistance for poor vision, voice input utilities for hand-impaired users, narrators, and many other options In this section, we will look at adding some of these features to your Windows application TIP For guidelines on the standards associated with accessibility features, visit Microsoft s web site: http://wwwmicrosoftcom/enable/ In order be Certified for Windows , an accessible application will:
24: Configuring a Windows Application
Support Control Panel size, color, font, and input settings Support High Contract mode Provide documented keyboard access to all features Expose location of the keyboard focus visually and programmatically Avoid conveying important information by sound alone These five requirements are verbatim from MSDN and, if followed, mean that your application can add the Certified for Windows logo to its packaging Every control in the Toolbox supports many of the accessibility guidelines, and Table 24-5 illustrates some of these properties EXAM TIP Use the SystemInformationHighContrast (which takes a Boolean value) to determine whether the High Contrast mode has been set If it is True, use the system color scheme for the application When the HighContrast changes, the UserPreferenceChanged event is raised Here are some extra tips for making your application more accessible: The user can resize menu bars, title bars, and the like through the Control Panel You do not need to code to accommodate for this Use the Windows API function FlashWindow to make the title bar flash This can provide a means of alerting the user to some condition that otherwise would have relied on sound Make use of status indicators in the status notification area of the task bar
Property Description
PART IV
AccessibleDescription AccessibleName AccessibleRole TabIndex Text FontSize Forecolor Backcolor BackgroundImage Table 24-5
Screen readers (specialized programs or devices) will be able to report this property to the disabled user Screen readers will use this name Screen readers will understand the use of this element This is the order in which the controls are tabbed This will make use of the & to provide alternate methods for accessing the control The font size should be set to an acceptable level for the form The property should be set to a default and the user s preferences will apply This should be treated in the same way as Forecolor Using this property can muddle the screen leave it blank
Accessibility Properties for Controls
MCAD/MCSD Visual C# NET Certification All-in-One Exam Guide
Localizing a Windows Form
In 7, we spoke generically about localizing an application In this section we will apply those concepts to a Windows Form Two key terms are used here: Globalization localization Localization This is building the functionality of the application without This involves translating the resources The CultureInfo class contains culture-specific information
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