Report Writer "CALL TRANSACTION tcode..."

Hello All,

I would appreciate help on the following subject:

I need to get some info from standard transaction, calling it from whitin my Z* report.

The transaction calls report writer program, that is why probably not a solution to use ABAP statement "SUBMIT program ...".

A problem is that I do not know how to get info (internal table) from transaction if to use the following statement:

CALL TRANSACTION tcode USING gt_bdc.

Here tcode is a transaction which calls report writer program.

Any ideas?
Thank you.
Regards, Alex.