Datagrid BoundColum - Showing different t

I want to make a boundcolumn in a datagrid, binding a "bit" (a boolean, true or false) row.
Ie:

<asp:BoundColumn DataField="Impreso" HeaderText="Status"></asp:BoundColumn>

But, when the row is 'false' I want to show the word "OK" in the screen (in the datagrid)
And when the row is 'true' I want to show the word "BAD".

Do someone know how can I do it? (or know where I can find some article to take a look?).

Thanks in advance.

Ok. Thanks very much for the info.

What I want to know is HOW can I make the templatecolumn in order to write the input.

Thanks!...