Article: Q11997
Product(s): Microsoft C Compiler
Version(s): MS-DOS:6.0,6.00a,6.00ax,7.0; OS/2:5.1,6.0,6.00a; WINDOWS:1.0,1.5; WINDOWS NT:1.0,2.0,4.
Operating System(s):
Keyword(s): kbCRT kbVC kbVC100 kbVC200 kbVC400 kbVC500 kbVC600
Last Modified: 10-MAY-2001
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The information in this article applies to:
- The C Run-Time (CRT), included with:
- Microsoft C for MS-DOS, versions 6.0, 6.0a, 6.0ax
- Microsoft C for OS/2, versions 5.1, 6.0, 6.0a
- Microsoft C/C++ for MS-DOS, version 7.0
- Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5
- Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 4.0, 5.0, 6.0
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SUMMARY
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The text below discusses the process through which an application can modify the
PROMPT environment variable in a spawned process. Use the same procedure to
modify any environment variable in a spawned process.
PROMPT is an environment variable used by MS-DOS, OS/2, and Windows NT. To change
the value for the PROMPT environment variable, use one of the following two
methods to specify the environment in which a child process runs.
- Use one of the spawn*e() functions. See the run-time library reference manual
or the online help file provided with your compiler for specific information
about the spawn() family of functions.
- Use the putenv() function to modify the environment in which your application
executes, then start the child process with one of the spawn() functions. See
the run-time library reference manual or the online help file provided with
your compiler for specific information about the putenv() function.
In general, a process can alter only the environment in which a child process
will run. The C run-time library functions simulate the ability to alter the
environment space in which the current process runs by making a copy of the
environment when the process starts up and allowing the process to modify the
copy of the environment.
Additional query words:
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Keywords : kbCRT kbVC kbVC100 kbVC200 kbVC400 kbVC500 kbVC600
Technology : kbVCsearch kbAudDeveloper kbCRT
Version : MS-DOS:6.0,6.00a,6.00ax,7.0; OS/2:5.1,6.0,6.00a; WINDOWS:1.0,1.5; WINDOWS NT:1.0,2.0,4.0,5.0
Issue type : kbhowto
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