>Dear Sir,
>
>I posted this question on www.foxite.com
>Where my dear professor Mr. Borislav Borissov posted following reply, and this work fine for me.
>
>*** AfterRowColChange event of the grid:
>LOCAL lbReadOnly
>lbReadOnly = (add condition here which makes columns ReadOnly)
>this.SetAll([ReadOnly], m.lbReadOnly, [Column])

You don't really need to use SetAll in this case if you want to make all columns readonly. Just set grid's readonly property accordingly.