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EnumKey method of the StdRegProv class

The EnumKey method enumerates the subkeys for a path. See Obtaining Registry Data for general information on accessing the registry through WMI.

This topic uses Managed Object Format (MOF) syntax. For more information about using this method, see Calling a Method.

Syntax


uint32 EnumKey(
  [in, optional] uint32 hDefKey = HKEY_LOCAL_MACHINE,
  [in]           string sSubKeyName,
  [out]          string sNames[]
);

Parameters

hDefKey [in, optional]

A registry tree, also known as a hive, that contains the sSubKeyName path. The default value is HKEY_LOCAL_MACHINE.

The following trees are defined in WinReg.h.

HKEY_CLASSES_ROOT (2147483648 (0x80000000))
HKEY_CURRENT_USER (2147483649 (0x80000001))
HKEY_LOCAL_MACHINE (2147483650 (0x80000002))
HKEY_USERS (2147483651 (0x80000003))
HKEY_CURRENT_CONFIG (2147483653 (0x80000005))
sSubKeyName [in]

A path that contains the subkeys to be enumerated.

sNames [out]

An array of subkey strings.

Return value

In C++, the method returns a uint32 value that is 0 (zero) if successful. If the function fails, the return value is a nonzero error code that is defined in WinError.h. In C++, use the FormatMessage function with the FORMAT_MESSAGE_FROM_SYSTEM flag to get a generic description of the error. You can also look up return values under the WMI Error Constants.

In scripting or Visual Basic, the method returns an integer value that is 0 (zero) if successful. If the function fails, the return value is a nonzero error code that you can look up in WbemErrorEnum.

Remarks

In some instances, useful configuration information is stored as the names of a set of subkeys. In the following sample script, for instance, the subkey names represent the services on a computer. In a case such as this, simply listing the names of the subkeys provides useful information.

The EnumKey method enables you to return the subkeys of a registry key or subkey. Note that the EnumKey method returns only the immediate subkeys of a key or subkey; it does not return any subkeys that might be contained within those top-level subkeys. To return all subkeys, you need to use a recursive function.

Examples

The following VBScript code example shows how to use the EnumKey method to enumerate the services listed as subkeys in the registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services

You can save the script as a file with a .vbs extension and send the output to a file by executing the command line in the folder that contains the script:

cscript Filename.vbs > output.txt


const HKEY_LOCAL_MACHINE = &H80000002
strComputer = "."
Set objReg=GetObject("winmgmts:{impersonationLevel=impersonate}!\\"&_ 
    strComputer & "\root\default:StdRegProv")
strKeyPath = "SYSTEM\CurrentControlSet\Services"
objReg.EnumKey HKEY_LOCAL_MACHINE, strKeyPath, arrSubKeys
WScript.Echo "Subkeys under " _
    & "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services"
For Each subkey In arrSubKeys
    If (IsNull( arrSubKeys ) = false) Then
    WScript.Echo subkey

Next

Requirements

Minimum supported client

Windows Vista

Minimum supported server

Windows Server 2003

Namespace

Root\default

MOF

RegEvent.mof

DLL

Stdprov.dll

See also

StdRegProv
Modifying the System Registry
WMI Tasks: Registry

 

 

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