PRB: Creating File with Exclusive Access Allows Concurrent Use

Last reviewed: July 23, 1997
Article ID: Q86723

3.10 WINDOWS kbprg kbprb

The information in this article applies to:

Microsoft Windows Software Development Kit (SDK) for Windows version 3.1

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 reference words: 3.10
KBCategory: kbprg kbprb
KBSubcategory: KrFileIO
Keywords : kb16bitonly

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Last reviewed: July 23, 1997
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