Chaining Parent PSP Environment Variables (96271)
The information in this article applies to:
- Microsoft Windows NT Server 3.1
- Microsoft Windows NT Workstation 3.1
- Microsoft Windows NT Server 4.0
- Microsoft Windows NT Workstation 4.0
This article was previously published under Q96271 SUMMARY
Some MS-DOS-based applications change the environment variables of
their parent applications by chaining through the program segment
prefix (PSP). This functionality is not provided under Windows NT if
the parent is a 32-bit application.
When an MS-DOS-based application starts from a single command shell
(SCS), it inherits a new copy of environment variables. Any attempts
by the application to modify its parent's environment variables are
unsuccessful. When the application closes, the SCS is restored to its
original state. If another MS-DOS-based application starts, none of
the changes the first application made exist.
However, if the parent is another MS-DOS-based application,
environment variables can be modified by the child application and
used by the parent.
| Modification Type: | Major | Last Reviewed: | 8/8/2001 |
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| Keywords: | kbenv KB96271 |
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