Hello GURUs

I guess this need a guru.
Can I control a row in a grid based on selection on other row in the grid.

for example, I have data in a grid row (table column) that points to another row in the grid and I wish to do something with this row (disable, change color) based on data in other row (flag =true)

is that possible? is there a setall() magic in the grid to accomplish this?