March 2001
Intermediate to advanced
116 pages
5h 18m
English
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Environment Variables
This section lists several key Windows 2000 environment variables. Note that environment variables are dereferenced by enclosing the name between percent signs—for example, %SystemRoot%. System and current user environment variables are modified via the path My Computer Properties→Advanced→Environment Variables:
- PATH
A semicolon-separated list of directories, which are searched in turn for a command entered without a full path.
- PATHEXT
A semicolon-separated list of file extensions that should be applied in turn to bare command names when searching for the proper executable. Extensions in the list must include the initial period.
- PROGRAMFILES
The location of the Program Files folder (usually C:\Program Files).
- SYSTEMROOT
The location of the Windows 2000 system directory (usually C:\WinNT).
- TEMP and TMP
Paths to a directory that applications may use for temporary file and scratch storage space.
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