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c# barcode creator Editing the Registry in C#
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As an alternative to exporting a hive with the Export command in Registry Editor, you can use the Save operation of Reg .exe, a command-line tool for registry operations . Because Reg .exe is a command-line tool, you can use it in batch programs, which might be useful for backing up a certain hive repeatedly or on a scheduled basis . For more information about Reg .exe, see Editing the Registry from the Command Line, page 26xx . Restoring the Registry from an Exported Hive
If you need to restore the exported hive from a registry hive file, select the same key in the left pane of the Registry Editor window, click Import on the File menu, and specify the file. You ll see a confirmation prompt letting you know that your action will overwrite (replace) the current key and all its subkeys. This is your last chance to make sure you re importing the hive into the right location, so take a moment to make sure you ve selected the correct key before you click Yes. Aoiding Registry Mishaps
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Importing a registry hive file replaces the entire content of the selected key with the contents of the file regardless of its original source . That is, it wipes out everything in the selected key and then adds the keys and values from the file . When you import, be absolutely certain that you ve selected the correct key . If you saved your backup as a .reg file, you use the same process to import it. (As an alternative, you can double-click the .reg file in Windows Explorer without opening Registry Editor.) Unlike the registry hive file, however, the complete path to each key and value is stored as part of the file and it always restores to the same location. This approach for recovering from registry editing mishaps is fine if you did not add new values or subkeys to the section of the registry you re working with; it returns existing data to its former state but doesn t alter the data you ve added. For more information about using .reg files, see Using .Reg Files to Automate Registry Changes, in this chapter . trOUBLeShOOtInG
You mistakenly deleted data from the HKLM\System\CurrentControlSet hive
As those dire warnings pointed out, improper changes to registry can prevent your computer from operating properly or even booting . This is particularly true for changes to the HKLM\System\CurrentControlSet hive . Because keys in that hive are so essential, Windows maintains a backup, which you can restore when necessary . To do that, begin by shutting down your computer . Start your computer and, during the boot process, press F8 . Use the arrow keys to select Last Known Good Configuration and then press Enter .
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