Interprocess communication

From: wizard (ksw412_at_hanafos.com)
Date: 09/30/04 

Date: Thu, 30 Sep 2004 09:15:51 +0900

I have to communicate interporcess. One application is RS-232 communication.
This application is received the 7 ~ 10 byte when signaled event, and
broadcasting data to other applications. Of course, I must send
acknowlegment as soon as receving the command. The MS book refers to this
method. One is the WM_COPYDATA, antother is using the memory-mapped object.
I don't select the method. Above condition, What is the better choice ?