ARTICLE

Locking Files in VB.NET

Posted by Vishal Kulkarni in Articles | Visual Basic 2010 on May 02, 2004

Tags: .NET, API, File Handling, Language, LockFile, Locking Files in VB.NET., VB.NET

This code shows how to lock and unlock files. A locked file will not be opened unless it is unlocked. It can lock any type of file.

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Download Files:

LockFileInVBNETVK.zip

Reader Level: Beginner

Description :

This code locks and unlocks the any type of file. The file unless unlocked will not open.

API Description :

CreateFile: This API owns the handle for the selected file.
CloseHandle : This API returns the handle to the file to the system.
LockFile : This API locks the file. Various constants can be tried out to study the API.

General Description :

Run this code. Select the desired file to be locked. Now the program owns the file handle. Anything to the file can be done in the program as it exclusively has the handle. Now try to open the file .The file will not be opened. It will say the file is locked. Now to unlock the file click "Press ok to Unlock the file", the file will be unlocked and can be used normally.

post comment

Hi! I used that code in vb.net 2008. but it didn't work at all. Please help.

Posted by Ravi Kant on Dec 11, 2010

hello i want to ask that is it possible to unlock the temp flv file with ur code

Posted by Sonia Sardana on Jul 29, 2009

hi,

i downloaded above zip files. but it does not run because of many errors.

please help me

Posted by Selvaraj on May 11, 2009

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Locking Files in VB.NET

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