Reading string from binary file

[F.Mayis]

Hi,

I have existing binary files where strings are stored with '\0' at the end.

  CString s;
  res = WriteFile(hFile,(LPCSTR)s, s.GetLength() + 1, &dw,NULL);

NB: it's like that and cannot be changed.

so each time I read a file I need to go and search the \0 to reconstruct the string.

There was existing code to read that but it was not efficient. I changed it but please can you tell me if someone have most efficient way or is there improvement that can be bring to the following code (of course they are ;-) )

    do{
        if ( !ReadFile(hFile,&c, 1, &dw,NULL) ) return TRUE;
        //End of file no \0 found error
        if ( dw != 1 )
            return TRUE;
        count++;
    }while (c != '\0');

    //back to the beginning of the string
    if ( SetFilePointer(hFile,
                                -count,
                                NULL,
                                FILE_CURRENT) == 0xFFFFFFFF ) return TRUE;

    //read the correct buffer size
    if ( ReadFile(hFile,(LPSTR)s.GetBuffer(count), count, &dw,NULL) ){
        //End of file not all read (???)
        if ( dw != count )
            return TRUE;
    }
    //release buffer
    s.ReleaseBuffer();

NB : I have to use Win32File, no nested classes like CFile or CStdioFile.

thanks a lot!