CFile open and create file

[ashokvishnu]

I want to lock a file so that another application will not be able to open it. I am using CFile.open method with the flags CFile::modeRead|CFile::shareExclusive. However, after opening the file (and keeping it open) I am able to open the file using the windows api CreateFile function. How can I lock the file so that, the CreateFile function will fail?

C++beginer

[prasad_som]

ashokvishnu wrote:

I am able to open the file using the windows api CreateFile function.

Can you show code ?

Prasad Notifier using ATL | Operator new[],delete[][^]

[ashokvishnu]

I found out the problem. If you use createfile function with dwDesiredAccess flag as 0, then it will not try to open the file. It will only check whether the file exists.

C++beginer

[CPallini]

ashokvishnu wrote:

I found out the problem. If you use createfile function with dwDesiredAccess flag as 0, then it will not try to open the file. It will only check whether the file exists.

I don't think that is a solution, at least for the problem you posted. What will happen if another application tries to open your file?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.