SAMPLE: Using ZwCreateFile() to Open File from Kernel

Last reviewed: February 17, 1998
Article ID: Q126286

The information in this article applies to:

Microsoft Win32 Device Development Kit (DDK) for Windows NT, versions 3.5, 3.51

SUMMARY

This sample demonstrates how to open a file from a Windows NT kernel-mode device driver using ZwCreateFile(). Once the file is open, it reads the contents of this file into a buffer using ZwReadFile(). After reading the file, it is closed using ZwClose().

NOTE: When you use the sample, a file called INFO.DAT must be available in the \SYSTEMROOT\SYSTEM32\DRIVERS directory.

The following file is available for download from the Microsoft Software Library:

 ~ Zwcf.exe (size: 21446 bytes)

For more information about downloading files from the Microsoft Software Library, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q119591
   TITLE     : How to Obtain Microsoft Support Files from Online Services

Keywords          : NTDDKKMode kbcode kbfile kbsample
Version           : WINNT:3.5,3.51;
Platform          : NT WINDOWS

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Last reviewed: February 17, 1998
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