Creating an SAP IDoc for sales orders

A SearchSAP.com reader wants to know how to create an SAP IDoc along with sales order details when sales orders are created, changed or cancelled.

I need to send an SAP IDoc with sales order details whenever a sales order is created, changed or cancelled.

What would be the best option to trigger this?

You would trigger this from an output message type from within VA01/VA02, just like you triggered a printout from the same transaction. If output is configured as type "6" for the IDoc, it will be handed over to the IDoc engine and needs configuration in WE20.