how to append to dynamic table

hi, everyone

I want to append some data to a dynamic internal table.

I have some code like following:

form dyna using itab.

DATA: NEW_LINE type ref to data.

FIELD-SYMBOLS: <FS_1> type any table,

<FS_2>,

<FS_3>.

assign itab to <FS_1>.

create data NEW_LINE like line of <FS_1>.

assign NEW_LINE->* to <FS_2>.

assign component 1 of structure <FS_2> to <FS_3>.

<FS_3> = 'I'.

assign component 2 of structure <FS_2> to <FS_3>.

<FS_3> = 'ABC'.

.......

• then <FS_2> is the entry I want to append now

• append ???

endform.

What I want to know is how to append the <FS_2> to the dynamic table. I require the entry can be append, and return out of this form.

Any suggestion and answer is welcome

Hope your reply, thanks a lot