How POSIX Applications are Recognized

Last reviewed: December 17, 1996
Article ID: Q101770

The information in this article applies to:

Microsoft Win32 Application Programming Interface (API) included with:
```
    - Microsoft Windows NT versions 3.51 and 4.00
```

The presence of the IMAGE_SUBSYSTEM_POSIX_CUI flag in the Subsystem field of the image's optional header means that the application is a 32-bit POSIX application.

KBCategory: kbprg
KBSubCategory: SubSys
Additional reference words: 3.51 4.00

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Last reviewed: December 17, 1996
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