>I have a table with clientes that contains
> a field "date".
>
>
>
> Name: date:
>
> Carl 04/30/2001
> Martin 04/30/2001
> Marck 05/01/2001
> John 05/03/2001
> Martha 05/04/2002
>
>
> On the table above,how can I do so that clients with date before 05/01/2001
> appears in red in the grid ?

Moises, you might try my Grid Highlighter class ( if you don't use it already) Supporting expressions like
birth_date < {05/01/2001}
for multiple records coloring is one of it's options.