bapi for creation of delivery by using SO,shipping point,delivery creation date

Hi experts,

I am looking for bapi that takes sales order,shipping point and delivery creation date and generates delivery.

I have tried with bapi GN_DELIVERY_CREATE but i am not able to understand whether this bapi is used for inbound or outbound deliveries.If this bapi is ok then what are the mandatory fields for this bapi.

Regards,

Pankaj Jain