Proper way to pass a structure as FORM parameter

Folks,

I need to pass a table that is of type LISTZEILE to a subroutine.

form mytest using myTable LIKE LISTZEILE.

loop at myTable.

write: / myTable.

endloop.

endform.

Syntax checker flags this declaration as an error. Can someone please suggest me the right way to declare this?

Just some background info. This subroutine is invoked from a custom RFC:

FUNCTION Z_MYRFC.

*"----

""Local Interface:

*" IMPORTING

blah

*" EXPORTING

blah

*" TABLES

*" RETURNTABLE STRUCTURE LISTZEILE

*"----

perform MyTest using returntable.

blah.

endfunction.

Thank you in advance for your help.

Regards,

Peter