DeviceIOControl failure

 I'm trying to get this block of code to work, but i don't know why it fails.
It's a direct conversion.

------CODE------
const
  ndisuio_device : array[0..16] of Char = '\\\\.\\\\Ndisuio'#0;
begin
  file_handle := CreateFile (ndisuio_device,
                             GENERIC_READ or GENERIC_WRITE,
                             0,
                             nil,
                             OPEN_EXISTING,
                             FILE_ATTRIBUTE_NORMAL,
                             INVALID_HANDLE_VALUE);
  if (file_handle <> 0) then
    last_status := DeviceIoControl (file_handle,
                                    IOCTL_NDISUIO_BIND_WAIT,
                                    nil,
                                    0,
                                    nil,
                                    0,
                                    bytes_returned,
                                    nil);
end;
------CODE------


 CreateFile() function goes through fine (i get non-null handle), but
DeviceIOControl() still throws error. GetLastError() shows number 6,
which should correspond to ERROR_INVALID_HANDLE.

 What am i doing wrong ?

-- 
Best regards,
 soya                          mailto:[email protected]



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