[NumLock]

Код:

var
  h: THandle;
  buf: array [0..$ffff] of Char;
  dummy: Cardinal;
begin
  h:=CreateFile(
    PChar('\\.\G:'),
    GENERIC_READ or GENERIC_WRITE,
    0,
    nil,
    OPEN_EXISTING,
    0,
    0
  );
  if h=0 then raise Exception.Create(SysErrorMessage(GetLastError));
  SetFilePointer(h, $0000, nil, FILE_BEGIN);
  if ReadFile(h, buf, SizeOf(buf), dummy, nil) then
    Memo1.Text:=Copy(buf, 1, dummy)
  else
    ShowMessage(SysErrorMessage(GetLastError));
  CloseHandle(h);
end;