create barcode image in vb.net Select the snap-in that you want to add to the console, and click the Add in C#

Creating PDF-417 2d barcode in C# Select the snap-in that you want to add to the console, and click the Add

4 Select the snap-in that you want to add to the console, and click the Add
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button. You might see a dialog box asking you which computer you want the snap-in to manage. If so, select Local Computer (or This Computer) and click Finish. This dialog box only appears with certain snap-ins.
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Barcode Reader In Visual C#
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(continued)
PDF 417 Generation In VS .NET
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PDF-417 2d Barcode Creation In .NET Framework
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4: Network Resources
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13
EAN13 Generation In Visual C#.NET
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Part 4: Network Resources
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Inside Out (continued)
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5 Repeat step 4 to add additional snap-ins. When you are done, click Close. 6 The snap-ins that you selected for this console now appear in the Add/
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Remove Snap-In dialog box, shown here. Click OK.
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7 The snap-ins appear in the console and are ready for your use. If you plan
to reuse this console, choose File, Save As and give the console a name. By default, the console is saved in your Administrative Tools folder. To open it again, type mmc at a command prompt, and then choose File, Open in the console window to select and open it.
4: Network Resources
13: Selecting a File System
Change Journal
Another important feature of the NTFS file system is the NTFS change journal. The change journal is used to keep track of all changes made to files on an NTFS volume. For example, the journal tracks information about added, deleted, and modified files for each NTFS volume. Each of these actions triggers an update of the change journal. Because the change journal can become very large, it can be configured with a maximum allowable size. Much like other log files, when the change journal exceeds its maximum allowable size, the oldest records in the journal are removed to restore the log file to its maximum size, making room for new entries to be added. In addition to providing robustness in the case of system failure, as discussed earlier, maintaining a change journal also allows applications that would otherwise need to scan the entire disk to detect file changes to simply check the journal for changes. This ability to reduce the overhead for applications that must track file changes (such as virus scanners, disk defragmenters, and Indexing Service) allows NTFS to perform efficiently, even on disks with large numbers of files.
NTFS Compression
With advances in disk storage technology and the dramatically lowered cost of data storage, file compression is not the burning issue it once was. But the overall amount of storage needed for computing continues to increase, even with the technological advances in storage technology. In the earlier days of computing with small and expensive hard disks using the FAT file system, compression was a hot feature and often a problematic one as well. With the FAT file system, most compression schemes resulted in a severe performance hit to any application needing to access files on a compressed volume. When compression didn t make the data inaccessible or even corrupt, it did ensure molasses-speed performance, particularly if the user compressed directories accessed by frequently used applications. NTFS builds file compression into the file system rather than requiring additional programs to be installed on top of it. Because all applications will access the compressed data through NTFS, the applications don t need to have any awareness of or support for disk compression. In addition, add-on compression utilities required compressing entire volumes. Some of the compressed files, such as large files that could be compressed a great deal and
4: Network Resources
13
Although MMC is beyond the scope of this book, it is a powerful feature that lets you create custom consoles as well as custom views and processes. You can learn more about using MMC in Microsoft Help And Support Center (choose Start, Help And Support).
Part 4: Network Resources
were infrequently accessed, improved the computing experience. But along with those files, other compressed files included binary and operating system files that compressed very little and had to be frequently (even constantly) accessed and decompressed, slowing the computing experience. By building file compression into the file system, the user can choose to compress files on a per-folder or per-file basis. Another noteworthy performance improvement over earlier forms of compression is that a file in active use only needs the part of the file being accessed to be decompressed. The decompressed portion remains uncompressed in memory so that subsequent access to it does not suffer a performance penalty. The file is recompressed only when the data is written back to disk. A handy though not performance enhancing feature allows the user to display the names of compressed files and folders in a different color to distinguish them from regular files. This clearly indicates which files are compressed without the user having to examine the properties of the file or folder. Of course, as everyone knows, even the best laid plans are prone to failure every now and then. So what happens if a user compresses a volume that results in the inability of Windows XP to restart normally With Windows XP, the user can use the Compact.exe command-line tool to either uncompress the files or force the compression to finish if it was interrupted and left the computer in an unstable state. This tool can also be used to enable disk compression via a batch file. Although it s usually much simpler to compress files using the Windows XP graphical interface, command-line tools are worth their weight in gold when you need them.
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