Create picking slip and registered it from SO using X++

Hello experts,

I have created a purchase order of type return order which is creating a intercompany sales order(return order). My requirement is I need to automate the registration process of Sales lines created .

Any code snippet for this would be highly appreciated.

further I saw method

InventTransWMS_Register::updateInventOnServer(_movementRecord,
                                                           tmpInventTransWMS,
                                                           mapQtyByTmpInventTransWMS.pack(),
                                                           mapInventTransInventTransOrigin.pack()); is called when doing registration manually. 

I have done research I got the code for picking list creation. But I am not able to do registration .

Thanks in Advance,

Prashanth N N