How to detect new cell value

We are using the GridFindReplaceDialogSink in conjunction with the GridControl and need to verify that Replace values meets certain data restrictions. For example, our application has columns that are defined as Numeric only and we want to check if the new replace value is number and not character data. We attempted to do this in the SaveCellInfo event but the value of the cell is still the old value prior. What event is triggered that allows us to validate the new replace value during the find and replace process. Domenick