add z table data into opportunity screen

Hi  all,

I am adding one custom view into the opportunity BSP component BT111H_OPPT.

1. In the View I am adding Model ZOPPT Base Entity BuilOpportunity  where I am have added GUID and OBJECT_ID.

2. I have added one value node ZVALUE  which is going to handle the attributes of Z table fields.

I am writing the logic DO_PREPARE_OUTPUT method , to get the table data filling the value node table.

But in the same method I need to  get the GUID or OBJECT_ID of ZOPPT context, How can get that data into this method.  based on this i need to filter the data.

any help is appreciated.

Regards,

ajayram