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Microsoft KB Archive/86723

From BetaArchive Wiki

PRB: Creating File with Exclusive Access Allows Concurrent Use


The information in this article applies to:

  • Microsoft Windows Software Development Kit (SDK) 3.1


When an application calls the OpenFile() API and specifies the OF_CREATE and OF_SHARE_EXCLUSIVE flags, the created file is not open for exclusive access. Another application can also open the file.


To create a file and open it for exclusive access, an application must create the file, close the file, and open it for exclusive access.


OpenFile() passes its parameters to MS-DOS Interrupt 21h. OpenFile() and Interrupt 21 exhibit the same behavior in this regard.

Additional query words: 3.10 no32bit

Keywords : kb16bitonly
Issue type :
Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310

Last Reviewed: November 6, 1999
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