When you want to change the cursor to a hand instead of the default pointer on mouse over, use CSS.

In you're gridview column:

<Columns>
      <asp:TemplateField HeaderText="Barcode">
           <ItemTemplate><span class="hand"><%# Eval("Column")%></span></ItemTemplate>
      </asp:TemplateField>
</Columns>

In the header:

<style type=”text/css”>
    .hand { cursor: pointer; cursor: hand; } /* cross browser hand */
</style>