How to make a file Copy Protect using WIN32

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Hello..

I have created a file using Core WIN32 & code is like this :

C++

HANDLE hFile = CreateFile("E:\\FileName123.txt", GENERIC_READ,0,0,OPEN_ALWAYS, FILE_ATTRIBUTE_READONLY, 0);

This will create a file with name FileName123 in E:Drive.

My question is: When it will create the file in E:Drive, it must become Copy Protect. That is., File should not copy to other location.

Please can u suggest any solution for this ..

Thanks..

Posted 9-Mar-12 0:57am

Guru_C++

Updated 9-Mar-12 2:01am

Jochen Arndt

v2

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Nelek 9-Mar-12 7:38am

Do you want to avoid copy always? or only while you have the file open?

Guru_C++ 10-Mar-12 1:49am

i dont want user to copy that file to some other location ..

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jk chan · Answer 1 · 2012-03-09T01:13:00

Solution 1

a simple solution is to open file with exclusive mode, ie CFile::shareExclusive.

Hopes this helps
jkchan
http://cgmath.blogspot.com

Posted 9-Mar-12 1:13am

jk chan

Comments

Guru_C++ 9-Mar-12 7:18am

Sorry... Din't got :(

Guru_C++ 9-Mar-12 7:56am

And, Also i searched about LockFile in MSDN.. Can anyone tell me how to use that LockFile function..

Jochen Arndt · Answer 2 · 2012-03-09T02:11:00

Solution 2

You have passed '0' as third parameter (dwShareMode) to CreateFile() and the file is opened in exclusive mode.

Therefore, the file can't be opened again until the handle is closed.

Posted 9-Mar-12 2:11am

Jochen Arndt

Comments

Guru_C++ 10-Mar-12 1:50am

So.. What i need to Pass for dwShareMode ..To make file as non-exclusive mode..

Jochen Arndt 10-Mar-12 4:02am

A combination of FILE_SHARE_DELETE, FILE_SHARE_READ and FILE_SHARE_WRITE. See the MSDN [^]

Guru_C++ 12-Mar-12 0:38am

After combination of all these, The file becomes Read only.. Can't chage the contents of the file.. But we can copy that file to some other location.. But how we can avoid that..! Suggest me..

Jochen Arndt 12-Mar-12 3:56am

The file becomes read only, because you are passing GENERIC_READ. To lock the file while opened, pass dwShareMode = 0. Setting one or more of the above flags opens the file in non-exclusive mode, allowing access to the file while it is opened (shared mode).