RegistryHive RegistryHive RegistryHive RegistryHive Enum

Definition

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

public enum class RegistryHive
[System.Runtime.InteropServices.ComVisible(true)]
public enum RegistryHive
type RegistryHive = 
Public Enum RegistryHive
Inheritance
Attributes

Fields

ClassesRoot ClassesRoot ClassesRoot ClassesRoot -2147483648

Represents the HKEY_CLASSES_ROOT base key on another computer. This value can be passed to the OpenRemoteBaseKey(RegistryHive, String) method, to open this node remotely.

CurrentConfig CurrentConfig CurrentConfig CurrentConfig -2147483643

Represents the HKEY_CURRENT_CONFIG base key on another computer. This value can be passed to the OpenRemoteBaseKey(RegistryHive, String) method, to open this node remotely.

CurrentUser CurrentUser CurrentUser CurrentUser -2147483647

Represents the HKEY_CURRENT_USER base key on another computer. This value can be passed to the OpenRemoteBaseKey(RegistryHive, String) method, to open this node remotely.

DynData DynData DynData DynData -2147483642

Represents the HKEY_DYN_DATA base key on another computer. This value can be passed to the OpenRemoteBaseKey(RegistryHive, String) method, to open this node remotely.

LocalMachine LocalMachine LocalMachine LocalMachine -2147483646

Represents the HKEY_LOCAL_MACHINE base key on another computer. This value can be passed to the OpenRemoteBaseKey(RegistryHive, String) method, to open this node remotely.

PerformanceData PerformanceData PerformanceData PerformanceData -2147483644

Represents the HKEY_PERFORMANCE_DATA base key on another computer. This value can be passed to the OpenRemoteBaseKey(RegistryHive, String) method, to open this node remotely.

Users Users Users Users -2147483645

Represents the HKEY_USERS base key on another computer. This value can be passed to the OpenRemoteBaseKey(RegistryHive, String) method, to open this node remotely.

Examples

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 namespace System;
using namespace System::IO;
using namespace System::Security::Permissions;
using namespace Microsoft::Win32;


int main( int argc, char *argv[] )
{
   RegistryKey ^ environmentKey;
   
   // Check that an argument was specified when the 
   // program was invoked.
   if ( argc == 1 )
   {
      Console::WriteLine( "Error: The name of the remote computer "
      "must be specified as input on the command line." );
      return  -1;
   }

   try
   {
      
      // Open HKEY_CURRENT_USER\Environment on a remote computer.
      environmentKey = RegistryKey::OpenRemoteBaseKey( RegistryHive::CurrentUser, gcnew String(argv[ 1 ]) )->OpenSubKey( "Environment" );
   }
   catch ( IOException^ e ) 
   {
      Console::WriteLine(  "{0}: {1}", e->GetType()->Name, e->Message );
      return  -1;
   }

   
   // Print the values.
   Console::WriteLine( "\nThere are {0} values for {1}.", environmentKey->ValueCount.ToString(), environmentKey->Name );
   array<String^>^valueNames = environmentKey->GetValueNames();
   for ( int i = 0; i < environmentKey->ValueCount; i++ )
   {
      Console::WriteLine(  "{0,-20}: {1}", valueNames[ i ], environmentKey->GetValue( valueNames[ i ] )->ToString() );

   }
   
   // Close the registry key.
   environmentKey->Close();
}

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


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 " +
                "invoked.");
            return;
        }
        else
        {
            remoteName = args[0];
        }

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

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

        // Close the registry key.
        environmentKey.Close();
    }
}
Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports System.Security.Permissions
Imports Microsoft.Win32


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

Remarks

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 user has appropriate permission.

Applies to

See Also