Windows set environment variable from file

Introduction

Environment variables are key-value pairs a system uses to set up a software environment. The environment variables also play a crucial role in certain installations, such as installing Java on your PC or Raspberry Pi.

In this tutorial, we will cover different ways you can set, list, and unset environment variables in Windows 10.

Prerequisites

• A system running Windows 10
• User account with admin privileges
• Access to the Command Prompt or Windows PowerShell

Check Current Environment Variables

The method for checking current environment variables depends on whether you are using the Command Prompt or Windows PowerShell:

List All Environment Variables

In the Command Prompt, use the following command to list all environment variables:

set

If you are using Windows PowerShell, list all the environment variables with:

Get-ChildItem Env:

Check A Specific Environment Variable

Both the Command Prompt and PowerShell use the echo command to list specific environment variables.

The Command prompt uses the following syntax:

echo %[variable_name]%

In Windows PowerShell, use:

echo $Env:[variable_name]

Here, [variable_name] is the name of the environment variable you want to check.

Follow the steps to set environment variables using the Windows GUI:

1. Press Windows + R to open the Windows Run prompt.

2. Type in sysdm.cpl and click OK.

3. Open the Advanced tab and click on the Environment Variables button in the System Properties window.

4. The Environment Variables window is divided into two sections. The sections display user-specific and system-wide environment variables. To add a variable, click the New… button under the appropriate section.

5. Enter the variable name and value in the New User Variable prompt and click OK.

Set Environment Variable in Windows via Command Prompt

Use the setx command to set a new user-specific environment variable via the Command Prompt:

setx [variable_name] "[variable_value]"

Where:

• [variable_name]: The name of the environment variable you want to set.
• [variable_value]: The value you want to assign to the new environment variable.

For instance:

setx Test_variable "Variable value"

To add a system-wide environment variable, open the Command Prompt as administrator and use:

setx [variable_name] "[variable_value]" /M

Unset Environment Variables

There are two ways to unset environment variables in Windows:

Unset Environment Variables in Windows via GUI

To unset an environment variable using the GUI, follow the steps in the section on setting environment variables via GUI to reach the Environment Variables window.

In this window:

1. Locate the variable you want to unset in the appropriate section.

2. Click the variable to highlight it.

3. Click the Delete button to unset it.

Unset Environment Variables in Windows via Registry

When you add an environment variable in Windows, the key-value pair is saved in the registry. The default registry folders for environment variables are:

• user-specific variables: HKEY_CURRENT_USEREnvironment
• system-wide variables: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment

Using the reg command allows you to review and unset environment variables directly in the registry.

Use the following command to list all user-specific environment variables:

reg query HKEY_CURRENT_USEREnvironment

List all the system environment variables with:

reg query "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment"

If you want to list a specific variable, use:

reg query HKEY_CURRENT_USEREnvironment /v [variable_name]

or

reg query "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment" /v [variable_name]

Where:

• /v: Declares the intent to list a specific variable.
• [variable_name]: The name of the environment variable you want to list.

Use the following command to unset an environment variable in the registry:

reg delete HKEY_CURRENT_USEREnvironment /v [variable_name] /f

or

reg delete "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment" /v [variable_name] /f

Run the setx command again to propagate the environment variables and confirm the changes to the registry.

setx [variable_name] trash

Conclusion

After following this guide, you should know how to set user-specific and system-wide environment variables in Windows 10.

Looking for this tutorial for a different OS? Check out our guides on How to Set Environment Variables in Linux and How to Set Environment Variables in MacOS.

If you use logical ( && or || ) or modulus (%) operators, enclose the expression string in quotation marks. Any non-numeric strings in the expression are considered environment variable names, and their values are converted to numbers before they are processed. If you specify an environment variable name that is not defined in the current environment, a value of zero is allotted, which allows you to perform arithmetic with environment variable values without using the % to retrieve a value.

If you run set /a from the command line outside of a command script, it displays the final value of the expression.

Numeric values are decimal numbers unless prefixed by 0Г— for hexadecimal numbers or 0 for octal numbers. Therefore, 0Г—12 is the same as 18, which is the same as 022.

Delayed environment variable expansion support is disabled by default, but you can enable or disable it by using cmd /v.

When creating batch files, you can use set to create variables, and then use them in the same way that you would use the numbered variables %0 through %9. You can also use the variables %0 through %9 as input for set.

If you call a variable value from a batch file, enclose the value with percent signs (%). For example, if your batch program creates an environment variable named BAUD, you can use the string associated with BAUD as a replaceable parameter by typing %baud% at the command prompt.

Examples

To set an environment variable named INCLUDE so the string c:directory is associated with it, type:

You can then use the string c:directory in batch files by enclosing the name INCLUDE with percent signs (%). For example, you can use dir %include% in a batch file to display the contents of the directory associated with the INCLUDE environment variable. After this command is processed, the string c:directory replaces %include%.

To use the set command in a batch program to add a new directory to the PATH environment variable, type:

To display a list of all of the environment variables that begin with the letter P, type:

Источник

Setting and getting Windows environment variables from the command prompt?

When I use the set command, it isn’t accessible in a new cmd session.

6 Answers 6

To make the environment variable accessible globally you need to set it in the registry. As you’ve realised by just using:

you are just setting it in the current process space.

According to this page you can use the setx command:

setx is built into Windows 7, but for older versions may only be available if you install the Windows Resource Kit

We can also use «setx var variable /M» to set the var to system environment variable level instead of user level.

Note: This command should be run as administrator.

/M for set system environment variable level instead of user level like @Minh Chau answer

RESTART command line (if you don’t restart command line, environment variable will not work)

You can use setx env var [/M] as mentioned above. If it doesn’t take effect you can use refreshenv to refresh environment variables. You don’t have to restart your computer, explorer.exe or your command prompt to do that.

Edit: apparantly refreshenv doesn’t come naturally with Windows, so here’s the source: https://pastebin.com/1fJqA0pT
Save as RefreshEnv.cmd and place it in a folder that’s included in your PATH environment variables

System variables can be set through CMD and registry For ex. reg query «HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment» /v PATH

All the commonly used CMD codes and system variables are given here: Set Windows system environment variables using CMD.

Open CMD and type Set

You will get all the values of system variable.

Type set java to know the path details of java installed on your window OS.

Источник

How to Set Environment Variable in Windows

Home » SysAdmin » How to Set Environment Variable in Windows

Environment variables are key-value pairs a system uses to set up a software environment. The environment variables also play a crucial role in certain installations, such as installing Java on your PC or Raspberry Pi.

In this tutorial, we will cover different ways you can set, list, and unset environment variables in Windows 10.

Check Current Environment Variables

The method for checking current environment variables depends on whether you are using the Command Prompt or Windows PowerShell:

List All Environment Variables

In the Command Prompt, use the following command to list all environment variables:

If you are using Windows PowerShell, list all the environment variables with:

Check A Specific Environment Variable

Both the Command Prompt and PowerShell use the echo command to list specific environment variables.

The Command prompt uses the following syntax:

In Windows PowerShell, use:

Here, [variable_name] is the name of the environment variable you want to check.

Set Environment Variable in Windows via GUI

Follow the steps to set environment variables using the Windows GUI:

1. Press Windows + R to open the Windows Run prompt.

2. Type in sysdm.cpl and click OK.

3. Open the Advanced tab and click on the Environment Variables button in the System Properties window.

4. The Environment Variables window is divided into two sections. The sections display user-specific and system-wide environment variables. To add a variable, click the New… button under the appropriate section.

5. Enter the variable name and value in the New User Variable prompt and click OK.

Set Environment Variable in Windows via Command Prompt

Use the setx command to set a new user-specific environment variable via the Command Prompt:

Note: You need to restart the Command Prompt for the changes to take effect.

To add a system-wide environment variable, open the Command Prompt as administrator and use:

Unset Environment Variables

There are two ways to unset environment variables in Windows:

Unset Environment Variables in Windows via GUI

To unset an environment variable using the GUI, follow the steps in the section on setting environment variables via GUI to reach the Environment Variables window.

1. Locate the variable you want to unset in the appropriate section.

2. Click the variable to highlight it.

3. Click the Delete button to unset it.

Unset Environment Variables in Windows via Registry

When you add an environment variable in Windows, the key-value pair is saved in the registry. The default registry folders for environment variables are:

Using the reg command allows you to review and unset environment variables directly in the registry.

Note: The reg command works the same in the Command Prompt and Windows PowerShell.

Use the following command to list all user-specific environment variables:

List all the system environment variables with:

If you want to list a specific variable, use:

Use the following command to unset an environment variable in the registry:

Note: The /f parameter is used to confirm the reg delete command. Without it, entering the command triggers the Delete the registry value EXAMPLE (Yes/No)? prompt.

Run the setx command again to propagate the environment variables and confirm the changes to the registry.

Note: If you don’t have any other variables to add with the setx command, set a throwaway variable. For example:

After following this guide, you should know how to set user-specific and system-wide environment variables in Windows 10.

Looking for this tutorial for a different OS? Check out our guides on How to Set Environment Variables in Linux and How to Set Environment Variables in MacOS.

Источник

Setting a system environment variable from a Windows batch file?

Is it possible to set a environment variable at the system level from a command prompt in Windows 7 (or even XP for that matter). I am running from an elevated command prompt.

When I use the set command ( set name=value ), the environment variable seems to be only valid for the session of the command prompt.

7 Answers 7

The XP Support Tools (which can be installed from your XP CD) come with a program called setx.exe :

I think Windows 7 actually comes with setx as part of a standard install.

Simple example for how to set JAVA_HOME with setx.exe in command line:

This will set environment variable «JAVA_HOME» for current user. If you want to set a variable for all users, you have to use option «-m». Here is an example:

Note: you have to execute this command as Administrator.

Note: Make sure to run the command setx from an command-line Admin window

1 like so: setx /M JAVA_HOME «C:Progra

If you set a variable via SETX, you cannot use this variable or its changes immediately. You have to restart the processes that want to use it.

Use the following sequence to directly set it in the setting process too (works for me perfectly in scripts that do some init stuff after setting global variables):

For XP, I used a (free/donateware) tool called «RAPIDEE» (Rapid Environment Editor), but SETX is definitely sufficient for Win 7 (I did not know about this before).

System variables can be set through CMD and registry For ex. reg query «HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment» /v PATH

All the commonly used CMD codes and system variables are given here: Set Windows system environment variables using CMD.

Open CMD and type Set

You will get all the values of system variable.

Type set java to know the path details of java installed on your window OS.

Just in case you would need to delete a variable, you could use SETENV from Vincent Fatica available at http://barnyard.syr.edu/

vefatica. Not exactly recent (’98) but still working on Windows 7 x64.

SetX is the command that you’ll need in most of the cases.Though its possible to use REG or REGEDIT

Источник

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Windows uses environment variables to store valuable information about system processes, resource usage, file path, and more.

Let’s learn how to set up system environment variables in Windows.

What are Environment Variables in Windows?

Environment variables help Windows set up a software environment and act as information containers for all applications running on the operating system. Imagine an application that wants to know the path to a specific file on your computer. The program can either go through the entire system and keep searching until it finds the file. A more innovative way is to call the PATH environment variable that contains the paths to all the system files.

Moreover, system environment variables also affect the installation of Java Development Kit, Java Runtime Environment, and other essential software. Just like the above examples, there are a plethora of small and extensive real-world use cases of environment variables that overall make Windows a snappier version of itself.

Types of Environment Variables

Windows creates and uses several environment variables, some of which are user-dependent and others remain the same for all users on a single machine. We can categorize environment variables using user dependence as a parameter and term them as system environment variables and user environment variables.

Information like the location of temporary files from an account, location of your user profile, etc., are stored under user variables. Windows gives the user account the privilege to edit the user variables, but other user accounts cannot edit them.

Other than this, Windows contains system environment variables created by the operating system, programs, drivers, and more. You cannot tweak the system environment variables, but Windows offers the option to tweak user environment variables’ values.

Methods to Setup System Environment Variables in Windows

You can set up system environment variables using different methods in Windows. Although the command line methods remain unchanged for all Windows versions, the GUI-based methods differ slightly for different Windows versions. Let’s look at all these methods in-depth.

GUI Based Methods

The GUI-based methods include using the Start search menu, the Run Window, and the Settings menu to tweak system environment variables. Let’s look at how you can access the GUI from various Windows versions.

Steps for Windows 11

Click on the Start Menu and search for “environment variables.”

The “Edit the system environment variables” option will appear in the search results. Click on the same, and Windows 11 will display the list of all environment variables.

Steps for Windows 10

Go to settings and enter the “About” menu.

Now go to “Advanced system settings.” The System Properties dialogue box should appear on your screen.

Click on the “Advanced” tab and select “Environment Variables.” Windows 10 will now display the entire list of user and system variables stored on your computer.

Using Run Window

Press Windows +R to explore the Run Window.

Now enter the following command:

rundll32.exe sysdm.cpl,EditEnvironmentVariables

All these methods should open the list of all the environment variables categorized under separate sections for user and system environment variables. You can create new user variables, edit the existing ones, or delete them using the same dialogue box.

Steps to create a new environment variable

Click on the “New” option using the Environment Variables dialogue box.

Now enter the Variable Name and its Value under the respective columns and press OK.

Creating the JAVA_HOME environment variable is a crucial step for installing Java Development Kit. So, let’s create the JAVA_HOME variable and later verify its existence. Click on the New option and enter “JAVA_HOME” as the variable name. Also, enter the installation path for the JDK as the variable value for JAVA_HOME.

The JAVA_HOME variable is now visible on the list of all environment variables, with the variable value as the path to the JDK. You can verify it by going to the “edit system variable” settings, and the JAVA_HOME variable should be present right there.

Steps to Edit environment variables

Click on the environment variable you want to edit and press the “Edit” option.

Now enter the Variable Name and its Value and press the OK button.

Let’s now edit the JAVA_HOME variable that we just created and change its value to another folder. Click on the variable and select the “Edit” option. Now enter a different variable value replacing the previous value and click OK.

Here also, you can verify the changed value on the environment variable list.

The updated variable is present on the user variable list.

Steps to Delete environment variables

Click on the environment variable you want to Delete.

Now Press the “Delete” option and press OK.

As an example, let’s delete the JAVA_HOME variable that we recently tweaked. Select the variable and press “Delete” and “OK” subsequently. The selected variable gets deleted from the list of variables.

The JAVA_HOME variable gets deleted from the list.

Command Prompt Method

You can use the Command Prompt or Windows PowerShell to set up environment variables. Let’s first look at how to use the command prompt method.

Viewing the environment variables

Open the command prompt in Windows.

Now enter “set” and press Enter. You can see the entire list of environment variables without any categorization, unlike the GUI-based method.

Creating new environment variables

Open the command prompt.

Use the following syntax using the setx command and press Enter:

setx [variable_name] “[variable_value]”

[variable_name] stands for the name of the variable you want to enter.

[variable_value] stands for the value for the newly created variable.

For example, let’s create a “TEST_VARIABLE” with a value “XYZ” and then verify its existence using Command Prompt. We use the following command:

setx [TEST_VARIABLE] “[XYZ]”

Congratulations! You just created a new user variable using Command Prompt. Now, let’s verify its existence. Use the “set” command to see the list of all the variables.

Windows PowerShell Method

PowerShell gives you more flexibility with the environment variables and lets you view, edit, and create them, but these are only valid for a single PowerShell session. The variable list returns to its original form once you close a PowerShell session.

Viewing system variables

Open the Windows PowerShell.

Now enter the following command:

Get-ChildItem Env:

Windows PowerShell will display the complete list of environment variables.

The environment variables won’t get categorized under system and user variables, but you can use the following commands to only view system variables using PowerShell:

[Environment]::GetEnvironmentVariables("Machine")

Otherwise, you can use the following command to only view the user environment variables:

[Environment]::GetEnvironmentVariables("User")

Creating and Editing environment variables

You can edit and create new environment variables using the $env built-in variable. Use the following command to create a new variable using PowerShell:

$env:Variable_name = 'Variable_value'

Here Variable_name stands for the name of the newly created environment variable, and the variable_value stands for its value.

Let’s create another test variable TEST_VARIABLE as an example and then verify its existence. We use the following command in the PowerShell:

$env:TEST_VARIABLE = '[ABC]'

We have also confirmed the variable value for TEST_VARIABLE using the following code:

$env:TEST_VARIABLE

PowerShell shows the output for the TEST_VARIABLE variable as [ABC].

Moreover, you can also tweak the value for an existing environment value using the following command:

$env:Variable_name = ';Variable_value2'

This would append the newly mentioned value to the original value for the environment variable.

Conclusion 🧑‍💻

Creating and tweaking system environment variables is crucial to direct programs and utilize their functionality. Windows gives you GUI-based and Command Line options to do the same. The GUI-based methods are simple and easy to follow. On the other hand, the Command-Line methods are swifter but more complicated.

Now you may check Tuning MySQL system variables for high performance.

Environment variables are not often seen directly when using Windows. However there are cases, especially when using the command line, that setting and updating environment variables is a necessity. In this series we talk about the various approaches we can take to set them. In this article we look at how to interface with environment variables using the Command Prompt and Windows PowerShell. We also note where in the registry the environment variables are set, if you needed to access them in such a fashion.

Print environment variables

You can use environment variables in the values of other environment variables. It is then helpful to be able to see what environment variables are set already. This is how you do it:

Command Prompt

List all environment variables

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ALLUSERSPROFILE=C:ProgramData
APPDATA=C:UsersuserAppDataRoaming
.
.
.
windir=C:Windows

Print a particular environment variable:

Windows PowerShell

List all environment variables

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Name                           Value
----                           -----
ALLUSERSPROFILE                C:ProgramData
APPDATA                        C:UsersuserAppDataRoaming
.
.
.
windir                         C:Windows

Print a particular environment variable:

Set Environment Variables

To set persistent environment variables at the command line, we will use setx.exe. It became part of Windows as of Vista/Windows Server 2008. Prior to that, it was part of the Windows Resource Kit. If you need the Windows Resource Kit, see Resources at the bottom of the page.

setx.exe does not set the environment variable in the current command prompt, but it will be available in subsequent command prompts.

User Variables

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setx EC2_CERT "%USERPROFILE%awscert.pem"

Open a new command prompt.

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C:Usersuserawscert.pem

System Variables

To edit the system variables, you’ll need an administrative command prompt. See HowTo: Open an Administrator Command Prompt in Windows to see how.

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setx EC2_HOME "%APPDATA%awsec2-api-tools" /M

Warning This method is recommended for experienced users only.

The location of the user variables in the registry is: HKEY_CURRENT_USEREnvironment. The location of the system variables in the registry is: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment.

When setting environment variables through the registry, they will not recognized immediately. One option is to log out and back in again. However, we can avoid logging out if we send a WM_SETTINGCHANGE message, which is just another line when doing this programatically, however if doing this on the command line it is not as straightforward.

One way is to get this message issued is to open the environment variables in the GUI, like we do in HowTo: Set an Environment Variable in Windows — GUI; we do not need to change anything, just open the Environment Variables window where we can see the environment variables, then hit OK.

Another way to get the message issued is to use setx, this allows everything to be done on the command line, however requires setting at least one environment variable with setx.

Printing Environment Variables

With Windows XP, the reg tool allows for accessing the registry from the command line. We can use this to look at the environment variables. This will work the same way in the command prompt or in powershell. This technique will also show the unexpanded environment variables, unlike the approaches shown for the command prompt and for powershell.

First we’ll show the user variables:

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reg query HKEY_CURRENT_USEREnvironment

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HKEY_CURRENT_USEREnvironment
    TEMP    REG_EXPAND_SZ    %USERPROFILE%AppDataLocalTemp
    TMP    REG_EXPAND_SZ    %USERPROFILE%AppDataLocalTemp

We can show a specific environment variable by adding /v then the name, in this case we’ll do TEMP:

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reg query HKEY_CURRENT_USEREnvironment /v TEMP

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HKEY_CURRENT_USEREnvironment
    TEMP    REG_EXPAND_SZ    %USERPROFILE%AppDataLocalTemp

Now we’ll list the system environment variables:

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reg query "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment"

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HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment
    ComSpec    REG_EXPAND_SZ    %SystemRoot%system32cmd.exe
    FP_NO_HOST_CHECK    REG_SZ    NO
    NUMBER_OF_PROCESSORS    REG_SZ    8
    OS    REG_SZ    Windows_NT
    Path    REG_EXPAND_SZ    C:ProgramDataOracleJavajavapath;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:WINDOWSSystem32WindowsPowerShellv1.0;%SystemRoot%system32;%SystemRoot%;%SystemRoot%System32Wbem;%SYSTEMROOT%System32WindowsPowerShellv1.0
    PATHEXT    REG_SZ    .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
    PROCESSOR_ARCHITECTURE    REG_SZ    AMD64
    PROCESSOR_IDENTIFIER    REG_SZ    Intel64 Family 6 Model 60 Stepping 3, GenuineIntel
    PROCESSOR_LEVEL    REG_SZ    6
    PROCESSOR_REVISION    REG_SZ    3c03
    PSModulePath    REG_EXPAND_SZ    %SystemRoot%system32WindowsPowerShellv1.0Modules;C:Program FilesIntel
    TEMP    REG_EXPAND_SZ    %SystemRoot%TEMP
    TMP    REG_EXPAND_SZ    %SystemRoot%TEMP
    USERNAME    REG_SZ    SYSTEM
    windir    REG_EXPAND_SZ    %SystemRoot%

And same as with the user variables we can query a specific variable.

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reg query "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment" /v PATH

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HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment
    PATH    REG_EXPAND_SZ    C:ProgramDataOracleJavajavapath;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:WINDOWSSystem32WindowsPowerShellv1.0;%SystemRoot%system32;%SystemRoot%;%SystemRoot%System32Wbem;%SYSTEMROOT%System32WindowsPowerShellv1.0

Unsetting a Variable

When setting environment variables on the command line, setx should be used because then the environment variables will be propagated appropriately. However one notable thing setx doesn’t do is unset environment variables. The reg tool can take care of that, however another setx command should be run afterwards to propagate the environment variables.

The layout for deleting a user variable is: reg delete HKEY_CURRENT_USEREnvironment /v variable_name /f. If /f had been left off, we would have been prompted: Delete the registry value EXAMPLE (Yes/No)?. For this example we’ll delete the user variable USER_EXAMPLE:

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reg delete HKEY_CURRENT_USEREnvironment /v USER_EXAMPLE /f

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The operation completed successfully.

Deleting a system variable requires administrator privileges. See HowTo: Open an Administrator Command Prompt in Windows to see how to do this.

The layout for deleting a system variable is: reg delete "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment" /v variable_name /f. For this example we’ll delete the system variable SYSTEM_EXAMPLE:

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reg delete "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment" /v SYSTEM_EXAMPLE /f

If this was run as a normal user you’ll get:

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ERROR: Access is denied.

But run in an administrator shell will give us:

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The operation completed successfully.

Finally we’ll have to run a setx command to propagate the environment variables. If there were other variables to set, we could just do that now. However if we were just interested in unsetting variables, we will need to have one variable left behind. In this case we’ll set a user variable named throwaway with a value of trash

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SUCCESS: Specified value was saved.

Resources

• Windows XP Service Pack 2 Support Tools
• Windows Server 2003 Resource Kit Tools
• Reg — Edit Registry | Windows CMD | SS64.com
• Reg — Microsoft TechNet
• Registry Value Types (Windows) — Microsoft Windows Dev Center
• How to propagate environment variables to the system — Microsoft Support
• WM_SETTINGCHANGE message (Windows) — Microsoft Windows Dev Center
• Environment Variables (Windows) — Microsoft Windows Dev Center

Windows Server 2003 Resource Kit Tools will also work with Windows XP and Windows XP SP1; use Windows XP Service Pack 2 Support Tools with Windows XP SP2. Neither download is supported on 64-bit version.

Parts in this series

• HowTo: Set an Environment Variable in Windows

• HowTo: Set an Environment Variable in Windows — GUI

• HowTo: Set an Environment Variable in Windows — Command Line and Registry