Microsoft KB Archive/86723

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PRB: Creating File with Exclusive Access Allows Concurrent Use

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Q86723

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The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK) 3.1

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SYMPTOMS
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.

RESOLUTION
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.

MORE INFORMATION
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