Dynamic ALV columns hide and visible

Hi guru's,

I am using ALV.

Initially I need to display 5 columns in alv. I have one button called display. Once that action triggered one more column (totally 6 columns)has to be display in ALV.

I tired by hiding column 6 using set_visible method in INIT and in display action button i wrote code to read all columns.

but is not working.

<Display button > is not inside the ALV. its another UI element in same view.

how to display hided column in ALV?

Thanks & Regards,

Meena.R