Communication between Cocoa and Carbon threads

Hi,I am new to Cocoa. Me and my team are working on an application for a scientific instrument. It is a Cocoa application in that user interface part is being developed using Cocoa. Now we have some lower level code that interacts with hardware and they are basically Carbon threads. Now our user interface needs to communicate with these Carbon threads. I have read in Mac OSX Technology overview that we can integrate Carbon with Cocoa application. So can anybody suggest what are the possible ways to send message from Cocoa thread to Carbon thread in an Cocoa Application. At present I am looking into NSThread details to find a way of communication....Thanks & Regards AbhijeetDear macosxdev ! Get Yourself a cool, short @in.com Email ID now!