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- DOCUMENT:Q96271 20-JUL-1993 [W_NT]
- TITLE :INF: Chaining Parent PSP Environment Variables
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- --------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- --------------------------------------------------------------------
-
- 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.
-
- Additional reference words: 3.10 winnt
-
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- Copyright Microsoft Corporation 1993.