Windows平台上的環境變數

Windows XP中比較常見的預定義環境變數

===========================

Variable	Typical value (May vary, depending on system)
%ALLUSERSPROFILE%	C:\Documents and Settings\All Users
%APPDATA%	C:\Documents and Settings\{username}\Application Data
%COMPUTERNAME%	{computername}
%COMSPEC%	C:\Windows\System32\cmd.exe
%HOMEDRIVE%	C:
%HOMEPATH%	\Documents and Settings\{username}
%PATH%	C:\Windows\System32\;C:\Windows\;C:\Windows\System32\Wbem
%PATHEXT%	.COM; .EXE; .BAT; .CMD; .VBS; .VBE; .JS ; .WSF; .WSH
%PROGRAMFILES%	Directory containing program files, usually C:\Program Files
%PROMPT%	Code for current command prompt format. Code is usually $P$G
%SYSTEMDRIVE%	The drive containing the Windows XP root directory, usually C:
%SYSTEMROOT%	The Windows XP root directory, usually C:\Windows
%TEMP% and %TMP%	C:\DOCUME~1\{username}\LOCALS~1\Temp
%USERNAME%	{username}
%USERPROFILE%	C:\Documents and Settings\{username}
%WINDIR%	C:\Windows

 

一些動態環境變數

===========================

Variable	Value
%DATE%	Current date in the format determined by the Date command
%TIME%	Current time in the format determined by the Time command
%CD%	Current directory with its full path
%ERRORLEVEL%	Number defining exit status of a previous command or program
%RANDOM%	Random number between 0 and 32767

 

Windows Vista/ 7 中常見的預定義環境變數

============================

Variable	Typical value (May vary, depending on system)
%ALLUSERSPROFILE%	C:\ProgramData
%APPDATA%	C:\Users\(username}\AppData\Roaming
%CommonProgramFiles%	C:\Program Files\Common Files
%COMPUTERNAME%	{computername}
%COMSPEC%	C:\Windows\System32\cmd.exe
%HOMEDRIVE%	C:
%HOMEPATH%	\Users\{username}
%LOCALAPPDATA%	C:\Users\{username}\AppData\Local
%PATH%	Varies. Includes C:\Windows\System32\;C:\Windows\;C:\Windows\System32\Wbem
%PATHEXT%	.COM; .EXE; .BAT; .CMD; .VBS; .VBE; .JS ; .WSF; .WSH; .MSC
%ProgramData%	C:\ProgramData
%PROGRAMFILES%	Directory containing program files, usually C:\Program Files
%ProgramFiles(x86)%	In 64-bit systems, directory containing 32-bit programs. Usually C:\Program Files (x86)
%PROMPT%	Code for current command prompt format. Code is usually $P$G
%Public%	C:\Users\Public
%SYSTEMDRIVE%	The drive containing the Windows XP root directory, usually C:
%SYSTEMROOT%	The Windows XP root directory, usually C:\Windows
%TEMP% and %TMP%	C:\Users\{Username}\AppData\Local\Temp
%USERNAME%	{username}
%USERPROFILE%	C:\Users\{username}
%WINDIR%	C:\Windows

 

資料來源:

Environment Variables in Windows XP

http://vlaurie.com/computers2/Articles/environment.htm

Environment Variables in Windows Vista and Windows 7

http://vlaurie.com/computers2/Articles/environment-variables-windows-vista-7.htm