How to make cells editable or non editable based on the other column cells?

Hi all,

I have two ALV Columns say Column 'A' and column 'B'.

Both columns are check boxes only.As soon as I execute the report,Screen 100 comes with Columns 'A' and 'B'.

Column 'B' will always be in disable mode.But some cells in Column 'B' will be checked and some cells will be unchecked.

Based on the status of the column 'B' cells,Column 'A' cells should be in either enabled mode(if correponding 'B' cell is checked)or disabled mode(if correspondng 'B' cell is unchecked)

Remember the entire Column 'B' will always be in disabled mode only .

Finally I want the cells of 'A' to be either in enabled or disabled mode based on the 'B' cells. Remember the entire Column 'B' will always be in disabled mode only.

Any code please.....?

Thanks,

Balaji