DOS Fn 440cH CL=6AH: IOCTL Query Current Code Page

                                                         Compatibility: 3.3+ 
 Expects: AX    440cH
          BX    file handle  (device or disk file)
          CL    6aH
          CH    device category: 00H=unknown
                                 01H=COMn (DOS 3.3+)
                                 03H=console (screen + keyboard) (DOS 3.3+)
                                 05H=parallel printer (DOS 3.2+)
          DS:DX Addr of buffer to hold an IoctlCpIdRec structure.
 Returns: AX    error code  if CF is set to CY
          DS:DX buffer is filled with IoctlCpIdRec identifying current cp
    Info: Query a driver to see what code page is currently active for that

See Also: Fn 44H (IOCTL)
          Fn 440cH (generic IOCTL for character devices)
          Fn 440cH 4aH (select code page)
          Generic IOCTL Data Packets
          National Language Support
          DOS Functions