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Windows Script Host doesn t care whether you use VBScript, JScript, or some other scripting language. All the objects are available to any language, and in most situations, you can choose to use the language with which you are most comfortable. In this book, we use VBScript. You can actually mix languages in the same program. VBScript is a major subset of Visual Basic. If you know Visual Basic, there is little that you can t do in VBScript. One of the biggest differences is that VBScript has only Variant variables. You simply use Dim and the variable name; you can t add a variable type because they are all the same. You can find documentation of VBScript at http://msdn.microsoft.com/ library/en-us/script56/html/vtoriVBScript.asp. Here is a short script, called Folders.vbs, that shows some of the elements of a script written in VBScript:

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Option Explicit Dim objWSShell Dim strMsg Dim intCtr Set objWSShell = WScript.CreateObject("WScript.Shell") WScript.Echo "Your desktop is " & objWSShell.SpecialFolders("Desktop") _ & vbNewLine strMsg = "All your special folders are:" & vbNewLine For intCtr = 0 To objWSShell.SpecialFolders.Count - 1 strMsg = strMsg & objWSShell.SpecialFolders.Item(intCtr) & vbNewLine Next WScript.Echo strMsg

Windows Server 2003 allows you to redirect the folders containing a user s profile to a location on the network using the Folder Redirection node in the Group Policy Object Editor console. The Offline Files feature provides users with access to redirected fold ers even when they are not connected to the network and can be set up manually or by using the Offline Folder node in Group Policy. This lesson introduces special folder redirection and walks you through the steps for setting up folder redirection using Group Policy. It also introduces the Offline Files feature and walks you through the steps for setting up Offline Files manually.

Automating Windows XP You can find Folders.vbs and all the other example scripts from this chapter on the companion CD. The script starts with an Option Explicit statement, which tells the VBScript interpreter to require you to use a Dim statement for every variable in the script. This helps to prevent errors from misspelled variable names and is accepted as good programming practice. The Set statement creates a WScript Shell object, which is used to access the special folders. One of the properties of the Shell object is the SpecialFolders object. The SpecialFolders object lets you retrieve the path and file name of any of the special folders on your system. For example, this script retrieves the path specification of the Desktop folder, as shown in Figure 15-7 below.

Summary

Explain the purpose of folder redirection Identify the folders that can be redirected Explain when to redirect My Documents to a home folder Redirect special folders Explain the purpose of the Offline Files feature Set up Offline Files

The next section of the script, the For Next loop, displays the folder paths of all the special folders. This section demonstrates a technique that makes scripts work well with both Wscript and Cscript. Instead of putting a WScript.Echo statement inside the loop, we add each result to the strMsg string and then display this string after the loop is finished. When run with Cscript, the results are the same. However, when run with Wscript, accumulating the results into a string and using one WScript.Echo statement means that one dialog box is displayed for the entire loop (as shown in Figure 15-8), rather than one dialog box for each special folder.

You redirect users folders to provide a centralized location for key Microsoft Windows XP Professional folders on a server or servers. This centralized location, called a sharepoint, provides users with an access point for storing and finding infor mation, and administrators with an access point for managing information. The Folder Redirection node in the Group Policy Object Editor console enables you to redirect certain special folders to network locations, including file shares in other forests in which two-way forests trusts have been established. Special folders are folders such as My Documents and My Pictures, which are located in C:\Documents and Settings (where C is the name of your system drive). Windows Server 2003 allows the following special folders to be redirected:

Figure 15-8.

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static Int64 TotalMemory(this IEnumerable<ProcessData> processes) { Int64 result = 0; foreach (var process in processes) result += process.Memory; return result; } static void Main() { DisplayProcesses( process => process.WorkingSet64 >= 20*1024*1024); } }

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