Здравствуйте, randydom, Вы писали:

R>I DID it but i get an Exception :
R>Scanner : Error replying message .Error = 0x800703E6

That is not an exception, that is function return error value: Invalid access to memory location.
Maybe wrong function prototype again, eg. check FilterReplyMessage argument dwReplyBufferSize (must be DWORD):

HRESULT
WINAPI
  FilterReplyMessage(
    __in HANDLE  hPort,
    __in PFILTER_REPLY_HEADER  lpReplyBuffer,
    __in DWORD  dwReplyBufferSize
    );