创建销售订单：BAPI_SALESORDER_CREATEFROMDAT2
创建退货销售订单：BAPI_CUSTOMERRETURN_CREATE
根据销售订单生成交货单：BAPI_DELIVERYPROCESSING_EXEC
修改外向交货单：BAPI_OUTB_DELIVERY_CHANGE
修改内向交货单：BAPI_INB_DELIVERY_CHANGE
交货单发货过账：WS_DELIVERY_UPDATE
VF01/VF04开票：BAPI_BILLINGDOC_CREATEMULTIPLE
