How to create sales order with reference using BAPI?

Hi All

Could you please tell me, which BAPI/FM is executed when 'CREATE WITH REFERENCE' tab is pressed in VA01?

I need to call that BAPI/FM in my RFC and use this functionality to create sales order with reference to another sales order. Also please specify which parameters will be required to pass to this BAPI/FM.

Thanks in advance,

Mihir Shah.