>Hi Barbara,
>which is the best settings for this goal ? for form buffermode and dataenvrionment ?
>and tableupdate routine ?
>
>TIA

It depends on the situation. If the table is used in a grid, you have to use table buffering because grids don't behave well with row buffering (at data entry grids don't). In this situation, I'll used code like what James posted in the grid's BeforeRowColChange method.