BAPI_SALESORDER_CHANGE Delivery Date at Line Item

Hi Guys,

We are trying to change the delivery date at the line item for a Sales Order using the date at the header.If we have a date change at the header,is there a way it can automatically change the date at the line item?can LOGIC_SWITCH field in the BAPI be used for this purpose.

we dont want to populate any line items.can only by changing the date,the dates at line item be changed?

thanks

Raj