Rangevalidation GridNumericColumn in EditMode="Batch"

Hi,

Using the RadGrid in Batch Editing mode and the EditType is set to row.

What is the best way to implement a RangeValidation for a GridNumericColumn ? I 

I just want the user having to enter a value between 1 and 999. If this is not the case, a small message indicates the error.

Thanks in advance to show me the way :)