>I am have a bit of difficulty with the following scenario.
>
>I have a grid on a form. The displayed numeric values in the grid need to be rounded if the user chosen rounding.
>
>I have the control source set to view.field when rounding is off
>and ROUND(view.field,2) when rounding is on.
>
>The problem is that when rounding is on, the value in the grid cannot be changed.
>
>I have tried changing the sparse and changing the controlsource on the fly (but this only works when the grid loses focus).
>
>Is there a way I can use the view.field as the control source, display the ROUNDED value, and still be able to edit the field?

You may use two grid.column for this trick: one with plain field as controlsource and another with ROUND(...). Normally, the first column is invisible, when second column gets a focus, it makes the first one visible and itself invisible. The first column makes opposite thing in its lostfocus event.