Windows XP中比较常见的预定义环境变量
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| 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 |
一些动态的环境变量
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| 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 中常见的预定义环境变量
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| 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 |
资料来源:
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