DataGrid

I have a Datagrid that gets populated with external numbers. Is there a way to color the negative number
[COLOR=red]Red[/COLOR] ?

i.e.
3241
[COLOR=red]-4363[/COLOR]
[COLOR=red]-4785[/COLOR]
23340

I will not know before which row will be negative or positive.

Please please Please HELPPPPPPP

Thanks,

:sure: :sure: :sure: :sure: :sure: :sure: