cin and binary mode

Is there any chance of slightest light at the end of the tunnel in pursuing
the cin and binary mode operation together?

I am trying to see if I can open the cin in binary mode for read operation.
I am using VC++ with VS .NET 2003

While using VS 6.0, it was a piece of cake, but since there were a lot of
things just removed in VC++ .NET 2003 version, I am having a hard time
converting this little piece of code....

previously with VS 6.0 it was,

istream_withassign myFile;
filebuf *myFileBuf;
........
myFileBuf = new filebuf (_fileno(stdin));
myFileBuf->setmode(filebuf::binary);
myFile = myFileBuf; // stream object is stream buffer

if (!(myFile.read(data, nBytes)))
{
        if (myFile.eof())
        {
            status = M_EndOfFile;
        }
        else
......
}
 
Which worked just fine.

Any ideas or hopes of converting it to VC++ .net 2003?

I have done something like this.... which obviously does not work..... It
reads the EOF before I expect it to. And it may be something with the cin not
opened in binary mode.

std::istream* myFile;

...........

myFile = &std::cin;

if (!(myFile->read (reinterpret_cast<char*>(data), nBytes)))
{
    if (myFile->eof())
        {
            status = M_EndOfFile;
        }
        else
        ..........
}

Any help is appreciated..... Thanks in advance,
M