HI, thanks for your reply. i had try from way to do, but i had question again.

A. i try to delete a CONTAINER at GRID1.COLUMN1 ( i goto EDIT OF GRID1, and select COLUMN1 then press DELETE key, the system will delete the column, but i just want to delete the CONTAINER )

B. before i put the CONTAINER into COLUMN1, i create it on FORM. but after i put it into COLUMN1, how can i remove it back to FORM, cause i want to add/delete more object at CONTAINER.