Sorting in datagrid?

[janis]

Hi everybody,
how to sort datagrid when AutoGenerateColumns is set to false?
When AutoGenerateColumns=true then sort is easy (column header is hyperlink and can click on it, only you need to do is to write sort function), but when AutoGenerateColumns=false and I create columns

<Columns>
    <asp:BoundColumn DataField="trans"    
                         HeaderText="Trans #" />
    <asp:BoundColumn DataField="date"
                         HeaderText="Trans date"/>
                <asp:BoundColumn DataField="amount"
                         HeaderText="Amount" />
</Columns>

then column header isn't hyperlink and can't click on it.
How to sort datagrid in that case?

regard j