CMemFile and Unicode

Am I right in thinking that the MFC class CMemFile is cannot be used to write unicode data to because it uses BYTE* which is defined as unsigned char BYT开发者_StackOverflow中文版E?

The line line that actually writes the data in CMemFile::Write is

 Memcpy((BYTE*)m_lpBuffer + m_nPosition, (BYTE*)lpBuf, nCount);

and if so can I replace BYTE with wchar_t in my own implementation of CMemfIle to get it working with unicode?

Thanks You Paul..

I don't see why it couldn't be used directly.

The only issue is that when you're doing memory copying, you can't interchange the character count with the byte count.

Files are binary so always read/write bytes and use an encoding layer to convert to/from string unless you are sure the data is in ASCII encoding.

No, you need an encoder/decoder. For Unicode you need a unicode header followed by encoded characters. The exact binary values of encoded characters could be different based on the unicode encoding (UTF-7, UTF-8, UTF-16, UTF-32, etc).