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pressed and a key is released respectively. The control that has the focus raises the event. When these events are raised, they package information about which key or combination of keys were pressed or released in an instance of KeyEventArgs that is passed to the method that handles the event. Table 4-12 describes the properties of KeyEventArgs.

If you are repeatedly issuing a path or object definition, you can assign it to a variable to reduce your level of effort. Variables in Windows PowerShell always begin with a dollar sign ($). For example, you can assign the variable $DNS to represent the object retrieved by the Get-Service DNS cmdlet:

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Troubleshooting startup problems in Microsoft Windows XP Professional is an important skill. To effectively troubleshoot startup problems, you must have a clear understanding of how the startup process works. This chapter introduces the Windows XP Professional startup process. It also teaches how the Windows Registry works and how to use the startup and recovery tools that Windows XP Professional provides. Lessons in this :

Tony Northrup I m often stubborn to a fault. For many years, I simply refused to learn regular expressions. Regular expressions were the UNIX way of doing things, and I was a Windows guy. Recently, I reviewed some code I wrote several years back when I was still being stubborn. I had written dozens of lines of code to check the validity of text data that could have been written with a singular regular expression. That doesn t bother me in itself, because sometimes writing more code improves readability. However, in this case, the text checking had gotten so complex that it contained bugs. I rewrote the code using regular expressions, and it not only fixed the bugs, but it simplified the code. So, for your own sake, don t ignore regular expressions just because they seem overly complex. Dive in, spend a few hours working with them, and you won t regret it.

Exchange ActiveSync is automatically enabled when the Client Access server role is installed on a computer running Exchange Server 2007. ActiveSync allows for the synchronization of data between mobile devices and Exchange Server 2007. Supported devices include Pocket PC 2002, Pocket PC 2003, and Windows Mobile 5.0. Windows Mobile 5.0 devices that have the Messaging Security and Feature Pack installed also support Direct Push, a technology that keeps a mobile device continuously synchronized with Exchange Server 2007. The primary configuration that you have to make is on the clients themselves. Lesson 2 of 7 provides more information on configuring mobile device policies.

Figure 12-9

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IsolatedStorageFile Provides management of isolated storage stores. Individual stores are separate isolated storage systems that are implemented as a single file in the file system. IsolatedStorageFileStream Provides access to read and write isolated storage files within stores. Isolated storage files behave exactly like conventional files stored directly on a file system, however, they exist within an isolated storage store.

USE AdventureWorks GO SELECT TOP(10) PERCENT WITH TIES LoginID, NationalIDNumber, Title, HireDate FROM HumanResources.EmployeeORDER BY HireDate DESC

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2. If referring to a form from within that form s code, you cannot use the default instance. You must use the special keyword Me (Visual Basic) or this (C#) to access the form s properties and methods.

The WebConfigurationManager class is not a member of the System.Configuration namespace as you might have expected. Instead, it belongs to the System.Web.Configuration namespace. To use the following examples, please include a reference to the System.Web.Configuration namespace, as well as the System.Collections namespace.

One of the most important aspects of tuning queries is measuring performance. When measuring performance, you need to know what to actually measure that is, what metric to use. In SQL Server, there are three main metrics to consider: query cost, page reads, and query execution time.

In addition, consider issuing a certificate to all your employees to help them certify who they are in all their Internet transactions. Keep in mind that all external certificates should include a trusted CA within them to enable them to work automatically with any browser.

525 per-server CALs also required for Server Beta and 540 per-server CALS required for Server Gamma. The total of these CALs is 1,565.