>Hello Edward
>
>Many thanks for your useful help.
>on my reply i forgot to ask you if in your code i can place where you have write:
>.RemoveObject(oColumn.name)
>
>"on lostfocus" or after changing "Afterrowcolumnchange" value of this column, some code for make for example a calculation in another column automatically.
>for example :
>1 column have % value - 21%
>2 one column - total of value
>3 another one = amount = total value * 21%
>i want when a change 21% to 10% then total value is automatically recalculate, or, if i write on the column of Totalvalue then recalculate the percent value %
>
>I hoop my question don´t make a little confused, but in this moment this is what i need to do , and on my first code i loop all the time.
>
>Best regards Edward
>
>Luis Santos

First of all, the code that you posted, and that I improved a bit, was just to remove a column, and realistically you could put in the place where you want to remove a column, e.g. in Form.Init (?), sorry I'm totally unfamiliar with your application.
In regard to your current questions: basically, you don't need in much coding to do it. You should put formulas in column.controlsource. For example, if column1.controlsource='mytable.amount', and you want to show 21% of this value in another column, then column2.controlsource='0+mytable.amount*21/100'.
If 21% is another field value, then column2.controlsource='0+mytable.amount*mytable.percent/100' etc.
You may multiple, add, subtract, do any kind of calculations within controlsource.