Hi Anuj,
I haven't used change pointers.
I used Message control to trigger the IDoc.
Message type: MBGMCR
IDoc type : MBGMCR03
There is no Outbound fucntion module exist, I have developed an Outbound function module.
You can use IDOC_INPUT_MBGMCR as inbound fucntion module.
Thanks,
Vamshi