Display header in GridView cell when mouse pointer hovers over it

    Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
        If (e.Row.RowType = DataControlRowType.DataRow) Or (e.Row.RowType = DataControlRowType.Header) Then
            For Each GridViewDataControlFieldCell As DataControlFieldCell In e.Row.Cells
                'Remove any hidden hyphens that might be in the header.
                Dim GridViewHeaderText As String = GridViewDataControlFieldCell.ContainingField.HeaderText.Replace(Chr(173), "")
                If e.Row.RowType = DataControlRowType.DataRow Then
                    GridViewDataControlFieldCell.Attributes.Add("Title", GridViewHeaderText)
                    GridViewDataControlFieldCell.Attributes.Add("onmouseover", "this.bgColor='lightyellow'")
                    GridViewDataControlFieldCell.Attributes.Add("onmouseout", "this.bgColor=''")
                Else
                    GridViewDataControlFieldCell.Attributes.Add("Title", "Click link to sort by " & GridViewHeaderText)
                End If
            Next
        End If
    End Sub