Auto Fill Number on # column

Hi All !

I have problem that i don't solve ,Can you help me?

:I create new form name ChildForm.now,I want to add grid on Child form.

1:i want to create autonumber for column # (RowHeaders) 1.2.3.4.5....when i add new record.

2:When form CHildForm show ,Parent form inactive.

3:On CHildForm ,I don't insert record have font Vietnamness.

Thank you !