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RegistryHive Enumeration

Represents the possible values for a top-level node on a foreign machine.

Namespace:  Microsoft.Win32
Assembly:  mscorlib (in mscorlib.dll)
'Declaration
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public Enumeration RegistryHive
'Usage
Dim instance As RegistryHive
Member nameDescription
ClassesRootRepresents the HKEY_CLASSES_ROOT base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
CurrentUserRepresents the HKEY_CURRENT_USER base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
LocalMachineRepresents the HKEY_LOCAL_MACHINE base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
UsersRepresents the HKEY_USERS base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
PerformanceDataRepresents the HKEY_PERFORMANCE_DATA base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
CurrentConfigRepresents the HKEY_CURRENT_CONFIG base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.
DynDataRepresents the HKEY_DYN_DATA base key on another computer. This value can be passed to the OpenRemoteBaseKey method, to open this node remotely.

RegistryHive values are used by the OpenRemoteBaseKey method to represent the top-level node of a requested key on a foreign (remote) machine. The node that can be opened with the OpenRemoteBaseKey method must be one of these top-level RegistryKeys. Further access to the subkeys of the identified node is available using using methods in RegistryKey, so long as the the user has appropriate permission.

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.

Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports System.Security.Permissions
Imports Microsoft.Win32

<Assembly: RegistryPermissionAttribute( _
    SecurityAction.RequestMinimum, _
    Read := "HKEY_CURRENT_USER\Environment")>
<Assembly: SecurityPermissionAttribute( _
    SecurityAction.RequestMinimum, UnmanagedCode := True)>

Public Class RemoteKey

    Shared Sub Main(commandLineArgs As String())

        Dim environmentKey As RegistryKey

        ' Check that an argument was specified when the  
        ' program was invoked. 
        If commandLineArgs.Length = 0 Then
            Console.WriteLine("Error: The name of the remote " & _
                "computer must be specified as input on the " & _
                "command line.")
            Return 
        End If 

        Try 
            ' Open HKEY_CURRENT_USER\Environment on a remote computer.
            environmentKey = RegistryKey.OpenRemoteBaseKey( _
                RegistryHive.CurrentUser, _
                commandLineArgs(0)).OpenSubKey("Environment")
        Catch ex As IOException
            Console.WriteLine("{0}: {1}", _
                ex.GetType().Name, ex.Message)
            Return 
        End Try 

        ' Print the values.
        Console.WriteLine("\nThere are {0} values For {1}.", _
            environmentKey.ValueCount.ToString(), environmentKey.Name)

        For Each valueName As String In environmentKey.GetValueNames()
            Console.WriteLine("{0,-20}: {1}", valueName, _
                environmentKey.GetValue(valueName).ToString())
        Next 

        ' Close the registry key.
        environmentKey.Close()

    End Sub 
End Class

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
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