Export (0) Print
Expand All
1 out of 4 rated this helpful - Rate this topic

RegistryKey.OpenRemoteBaseKey Method

Opens a new RegistryKey that represents the requested key on a remote machine.

Namespace:  Microsoft.Win32
Assembly:  mscorlib (in mscorlib.dll)
public static RegistryKey OpenRemoteBaseKey(
	RegistryHive hKey,
	string machineName


Type: Microsoft.Win32.RegistryHive

The HKEY to open, from the RegistryHive enumeration.

Type: System.String

The remote machine.

Return Value

Type: Microsoft.Win32.RegistryKey
The requested RegistryKey.

hKey is invalid.


machineName is not found.


machineName is null.


The user does not have the proper permissions to perform this operation.


The user does not have the necessary registry rights.

The local machine registry is opened if machineName is String.Empty. The requested key must be a root key on the remote machine, and is identified by the appropriate RegistryHive value.

In order for a key to be opened remotely, both the server and client machines must be running the remote registry service, and have remote administration enabled.

The following code example shows how to open a registry key on a remote computer and enumerate the values of the key. The remote computer must be running the remote registry service. Specify the name of the remote computer as a command-line argument when invoking the program.

using System;
using System.IO;
using System.Security.Permissions;
using Microsoft.Win32;

[assembly: RegistryPermissionAttribute(SecurityAction.RequestMinimum,
    Read = @"HKEY_CURRENT_USER\Environment")]
[assembly: SecurityPermissionAttribute(SecurityAction.RequestMinimum,
    UnmanagedCode = true)]

class RemoteKey
    static void Main(string[] args)
        RegistryKey environmentKey;
        string remoteName;

        // Check that an argument was specified when the  
        // program was invoked. 
        if(args.Length == 0)
            Console.WriteLine("Error: The name of the remote " +
                "computer must be specified when the program is " +
            remoteName = args[0];

            // Open HKEY_CURRENT_USER\Environment  
            // on a remote computer.
            environmentKey = RegistryKey.OpenRemoteBaseKey(
                RegistryHive.CurrentUser, remoteName).OpenSubKey(
        catch(IOException e)
            Console.WriteLine("{0}: {1}", 
                e.GetType().Name, e.Message);

        // Print the values.
        Console.WriteLine("\nThere are {0} values for {1}.", 
        foreach(string valueName in environmentKey.GetValueNames())
            Console.WriteLine("{0,-20}: {1}", valueName, 

        // Close the registry key.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

© 2014 Microsoft. All rights reserved.