reg EXPORT /?: Exports all subkeys and values of the key MyApp to the file xxxxx.reg. ....

Here are examples of using the `REG EXPORT` command: Example 1: Exporting an entire registry branch to a .reg file:

REG EXPORT HKLM\Software\MyCo MyCoBackup.reg

- Exports the entire registry branch "HKLM\Software\MyCo" to the file "MyCoBackup.reg". This REG file contains all keys, subkeys, and values ??of the specified registry branch. Example 2: Exporting a specific value under a registry branch:

REG EXPORT HKCU\Software\MyApp /v AppVersion AppVersionBackup.reg

- Exports the value named "AppVersion" under the registry branch "HKCU\Software\MyApp" to the file "AppVersionBackup.reg". This creates a REG file containing only the specific value. Example 3: Exporting a registry branch using 32-bit registry view:

REG EXPORT HKLM\Software\Wow6432Node\MyApp MyAppBackup.reg /reg:32

- Exports the entire registry branch "HKLM\Software\Wow6432Node\MyApp" using the 32-bit registry view and saves the export file as "MyAppBackup.reg". Example 4: Exporting an entire registry tree to a REG file:

REG EXPORT HKLM\Software\MyCo MyCoTreeBackup.reg /s

- Exports the entire registry branch "HKLM\Software\MyCo" and all subkeys and values ??to the file "MyCoTreeBackup.reg". The `/s` option ensures that the entire tree is exported. Example 5: Exporting a registry branch from a remote computer:

REG EXPORT \\RemoteComputer\HKLM\Software\MyApp MyAppRemoteBackup.reg

- Exports the entire registry branch "HKLM\Software\MyApp" from a remote computer named "RemoteComputer" to the file "MyAppRemoteBackup.reg". The `REG EXPORT` commands allow part or all of the registry contents to be exported to a REG file, which can later be used for import or backup purposes.

Microsoft Windows [Version 10.0.19045.3693]
(c) Copyright 1985-2023 Microsoft Corp.

C:\\WINDOWS>


Console Registry Tool for Windows - version 3.0
Copyright (C) Microsoft Corp. 1981-2001.  All rights reserved


REG EXPORT KeyName FileName

  Keyname    ROOTKEY\SubKey (local machine only)
    ROOTKEY  [ HKLM | HKCU | HKCR | HKU | HKCC ]
    SubKey   The full name of a registry key under the selected ROOTKEY
  FileName   The name of the disk file to export

Examples:

  REG EXPORT HKLM\Software\MyCo\MyApp AppBkUp.reg
    Exports all subkeys and values of the key MyApp to the file AppBkUp.reg

When using the `REG EXPORT` command, there are a few important points to pay attention to: 1: Check permissions: Make sure that you have sufficient permissions to access the registry keys and values ??that you want to export. Some parts of the registry require elevated privileges. 2: Filenames and Paths: Make sure to use valid filenames and paths for the export file. Avoid special characters that could cause problems with export or import. 3: Overwriting files: If you create an export file with the same name as an existing file, the existing file will be overwritten unless you explicitly confirm this. Be careful not to overwrite important data. 4: Path with quotation marks: If the export destination path contains spaces or special characters, you should enclose the path in quotation marks to ensure that it is interpreted correctly. 5: `/reg:32` and `/reg:64` options: If you use the `/reg:32` or `/reg:64` options to choose the registry view, make sure that that you choose the right view for your system. 32-bit applications should typically use the 32-bit registry view. 6: Remote Export: When exporting registry branches from a remote computer (`\\RemoteComputer\...`), ensure that you have the necessary permissions to access the remote computer and that The Remote Registry service is enabled on the target computer. 7: Check the export: Carefully check the export file to ensure that it contains the expected keys and values. You can open the file with a text editor to inspect the contents. 8: Create Backup: It is recommended that you always create a backup before making important changes to the registry. This allows you to restore the previous state if problems arise. Consider these points to ensure that the export process goes smoothly and that you have reliable backup when needed.