fstream & file sharing: How to do what you used to be able to do?

[kberson]

With .Net 2003, fstream.h disappeared and the open command went from three parameters to two.

How do I now open a file and deny other applications from accessing the file until I am done writing to it? I used to be able to do:

fstream outf("somefile.txt",ios::app,filebuf::sh_none);  

Is there another way to do this, or am I out of luck?