"immovable" Datagrid Header

I want to have a datagrid with a "fixed" header.
What I mean is that you can scroll the content of the datagrid but the header remains in the same
position so as you can see the content and get a reference of what's that colum, seeing the header.

Do someone know how can I do that?

Thanks in advance!.

Pablo Pecora
Banco Itaú - Argentina

something like

 < table >
   < tr >
     < td > This is a fixed header field < /td >
     < td > This is also a fixed header field < /td >
   < /tr >
   < tr >
     < td > This is the datagrid row, without the code < /td >
     < td > This is also a datagrid row, without the code < /td >
   < /tr >
 < table >

Of course, do NOT use the spaces in the HTML statements, but since the browser might parse it, I haven't done it.

If you do a search in the forums at http://www.asp.net this topic has been discused many times and there are some solutions posted.