itab declare dynamic

Hi,

i would to declare an itab dynamicly.

normaly i di this:

DATA: ITAB TYPE table of MARA.

OR

DATA: BEGIN OF ITAB OCCURS 0.

INCLUDE STRUCTURE MARA.

DATA: END OF ITAB.

Now i want this:

PARAMETER: <b>DB_TAB</b> LIKE DATABROWSE-TABLENAME.

DATA: ITAB TYPE table OF <b>DB_TAB</b>.

OR

DATA: BEGIN OF ITAB OCCURS 0.

INCLUDE STRUCTURE <b>DB_TAB</b>.

DATA: END OF ITAB.

Has anyone an idea?

thanks

Regards, Dieter