Bind data to Carrier Party in Create ASN

Hi,

I have created one custom webdynpro application in Create ASN screen that will determine the carrier party.

there i created button with action method. if user clicks on button then that value should be bind to Carrier Party Input field in Shipping Details tab.

For binding data

1. Created class ZCARRIER_PARTY with reference of /SCF/CL_FRMBOX_ASNM_HDR2. and create method ZBIND_DATA with public same as BIND_DATA.

    2. Found the context values from table /SCF/NAMEBNDG

here I am not able to find the object GUID and parent object GUID to passing parameter to method.

Please any one can suggest how to bind the value to carrier party input field?

Regards,

BBC