IDOC Sender (ORDERS)

HI,

I want to get ORDERS.ORDERS03 IDOC from R/3 to File..

Actually i decided to do this by looking at this blog.

/people/prateek.shah/blog/2005/06/08/introduction-to-idoc-xi-file-scenario-and-complete-walk-through-for-starters

The problem is, how to create receiver datatype from such a IDOC (which has more elements) ?

Any Sugg?

Thanks

Seshu