MQ SERIES doubt

I have 2 queue managers speaking to each other using Remote queue definition 
and transmission queue, sender channel and receiver channel. What I want to do 
is track the message where all it flows through. For this we need a channel 
exit program. I have generated a service program for the same. Iam working on 
MQ Series.

Now what I want to do is call this service program when the message moves 
across the channel. That is this service program should get activated, when the 
message moves across a channel. This will be analogous to dll in windows. So it 
will load library in windows. If this has to be AS400 not sure as to what is to 
be done. I want to know how to this service program will be invoked when the 
message moves across the channel. 

Service program what it does is 1) Adds timestamp to the MQMD part of the 
message. 2) Copies the message on to an other local Queue. 

I have created the service program using CRTSRVPGM command. 

your help is appreciated!

Thanks a lot for your valuable inputs!

Murali.

                
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