Environment Variables (Windows) - Microsoft Windows Dev Center.WM_SETTINGCHANGE message (Windows) - Microsoft Windows Dev Center.How to propagate environment variables to the system - Microsoft Support.Registry Value Types (Windows) - Microsoft Windows Dev Center.Windows XP Service Pack 2 Support Tools.PSModulePath REG_EXPAND_SZ %SystemRoot%\system32\WindowsPowerShell\v1.0\Modules\ C:\Program Files\Intel\Īnd same as with the user variables we can query a specific variable. PROCESSOR_IDENTIFIER REG_SZ Intel64 Family 6 Model 60 Stepping 3, GenuineIntel Path REG_EXPAND_SZ C:\ProgramData\Oracle\Java\javapath C:\WINDOWS\system32 C:\WINDOWS C:\WINDOWS\System32\Wbem C:\WINDOWS\System32\WindowsPowerShell\v1.0\ %SystemRoot%\system32 %SystemRoot% %SystemRoot%\System32\Wbem %SYSTEMROOT%\System32\WindowsPowerShell\v1.0\ HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\EnvironmentĬomSpec REG_EXPAND_SZ %SystemRoot%\system32\cmd.exe This technique will also show the unexpanded environment variables, unlike the approaches shown for the command prompt and for powershell. ![]() This will work the same way in the command prompt or in powershell. We can use this to look at the environment variables. With Windows XP, the reg tool allows for accessing the registry from the command line. 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.Īnother 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. 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 option is to log out and back in again. ![]() ![]() When setting environment variables through the registry, they will not recognized immediately. The location of the system variables in the registry is: HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Control\ Session Manager\ Environment. The location of the user variables in the registry is: HKEY_CURRENT_USER\ Environment. Warning This method is recommended for experienced users only.
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