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As you develop your component, you will need to plan for when the unexpected happens. Your component needs to deal with exceptions. You need to determine when it is appropriate to throw an exception as well as what course of action to take if an exception is thrown during your component s execution. We will deal with these two decisions separately.

Full Control Delete Message Receive Message Peek Message Receive Journal Message Get Queue Properties Set Queue Properties Get Permissions

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UPDATE Production.Product SET Color = ISNULL(Color, 'N/A')

The following MSDN articles discuss how to disable NetBIOS and SMB: msdn2.microsoft.com/ en-us/library/ms143696.aspx and msdn2.microsoft.com/en-us/library/ms143455.aspx.

Resolving Issues Related to Usability (2.0)

Stop errors, also referred to as blue screen errors, occur when the system detects a condition from which it cannot recover. The system stops responding and displays a screen of information on a blue background. The most likely time during installation that you might experience stop errors is when the text mode stage of setup has finished, your computer restarts, and the Setup Wizard stage begins. During this transi-

TRUNCATE TABLE Credit;

1. Msconfig 2. Msinfo32 3. Chkdsk A. A command-line tool that creates a status report of the integ rity of the hard disk and corrects errors on the disk B. A command-line tool that scans and verifies all protected sys tem files on the computer and replaces any missing files C. A command-line tool that opens the System Configuration Utility, which can be used to troubleshoot and resolve startup errors and get rid of unwanted prompts by third-party applica tions D. A command-line tool that opens the System Information win dow, which provides detailed information about the computer system configuration E. A program included with Windows XP that analyzes hard disks and locates and consolidates fragmented files and folders

7. What range of IP addresses would you expect to see for the wireless network connections on the other notebook computers

Weak passwords are one of the big security risks in most environments. For this reason, you should encourage users to select and use strong passwords, even if they do not really want to. The following list shows why common password selections are considered weak:

header In network data transmission, one of the three sections of a packet component. It includes an alert signal to indicate that the packet is being transmitted, the source address, the destination address, and clock information to synchronize transmission. hertz (Hz) The unit of frequency measurement. Frequency measures how often a periodic event occurs, such as the manner in which a wave s amplitude changes with time. One hertz equals one cycle per second. Frequency is often measured in kilohertz (KHz, 1000 Hz), megahertz (MHz, 1000 KHz), gigahertz (GHz, 1000 MHz), or terahertz (THz, 1000 GHz). hibernate mode A state where Windows saves the current system state (including open programs and windows) to your hard disk and then shuts the computer down. When you restart the computer, the open programs and windows are restored. HID See Human Interface Device (HID).

Connecting to Network Printers 11-21

' VB <DataContract()> _ Public Class ContactInfo <DataMember()> _

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DataTable productsTable = productDataSet.Tables[0];

8

You might expect this to show you the names of each person in the emailLookup variable. What is actually written to the console is this:

In the following case scenarios, you apply what you ve learned about subjects of this chapter. You can find answers to these questions in the Answers section at the end of this book.

myPublicKeyTextBox.Text = Convert.ToBase64String(myRSAParameters.Modulus)

Universal groups are used primarily to grant access to resources in all trusted domains, but universal groups can only be used as a security principal (security group type) in a Windows 2000 native or Windows Server 2003 domain functional level domain.

Windows XP Professional provides two tools that help you work with policies. The RSoP tool lets you view the actual settings in effect on a computer and the source GPO of those settings. The Group Policy Result tool is a command-line utility that shows you the GPOs affecting a computer.

Setting Up Network Printers 11-15

5. Run the test. Notice that it fails. It does not return an exception. This means we have not trapped for this condition in the code. You would now have to consider adding code to check for this condition. Figure 13-5 shows the failed test results.

Table 4-4

After this lesson, you will be able to: