The following allows you to add a tooltip to the header links of your GridView, a feature that is lacking.

VB.Net Code:
Code:
Private Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles GridView1.RowDataBound
    ' Check the row type is header
    If e.Row.RowType = DataControlRowType.Header Then
        For Each cell As TableCell In e.Row.Cells
            For Each ctrl As Control In cell.Controls
                If ctrl.GetType().ToString().Contains("DataControlLinkButton") Then
                    cell.Attributes.Add("title", CType(ctrl, LinkButton).Text)
                End If
            Next
        Next
    End If
End Sub
C# code:
Code:
private void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) 
{ 
    //Check the row type is header 
    if (e.Row.RowType == DataControlRowType.Header) { 
        foreach (TableCell cell in e.Row.Cells) { 
            foreach (Control ctrl in cell.Controls) { 
                if (ctrl.GetType().ToString().Contains("DataControlLinkButton")) { 
                    cell.Attributes.Add("title", ((LinkButton)ctrl).Text); 
                } 
            } 
        } 
    } 
}