How to export the grid with row headers and column headers in WinForms GridGroupingControl?

private void button1_Click(object sender, EventArgs e)
{
   SaveFileDialog saveFileDialog = new SaveFileDialog();
   saveFileDialog.Filter = "Files(*.Xls)|*.Xls|Files(*.Xlsx)|*Xlsx";
   saveFileDialog.AddExtension = true;
   saveFileDialog.DefaultExt = ".Xls";
   saveFileDialog.FileName = "Book1";
   if (saveFileDialog.ShowDialog() == DialogResult.OK && saveFileDialog.CheckPathExists)
   {
       excelConverter.GroupingGridToExcel(this.gridGroupingControl1, saveFileDialog.FileName, ConverterOptions.ColumnHeaders);
       if (MessageBox.Show("Do you wish to open the xls file now?", "Export to Excel", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
       {
           System.Diagnostics.Process proc = new System.Diagnostics.Process();
           proc.StartInfo.FileName = saveFileDialog.FileName;
           proc.Start();
       }
   }
}

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
   Dim saveFileDialog As New SaveFileDialog()
   saveFileDialog.Filter = "Files(*.Xls)|*.Xls|Files(*.Xlsx)|*Xlsx"
   saveFileDialog.AddExtension = True
   saveFileDialog.DefaultExt = ".Xls"
   saveFileDialog.FileName = "Book1"
   If saveFileDialog.ShowDialog() = System.Windows.Forms.DialogResult.OK AndAlso saveFileDialog.CheckPathExists Then
      excelConverter.GroupingGridToExcel(Me.gridGroupingControl1, saveFileDialog.FileName, ConverterOptions.ColumnHeaders)
      If MessageBox.Show("Do you wish to open the xls file now?", "Export to Excel", MessageBoxButtons.YesNo, MessageBoxIcon.Question) = System.Windows.Forms.DialogResult.Yes Then
         Dim proc As New System.Diagnostics.Process()
         proc.StartInfo.FileName = saveFileDialog.FileName
         proc.Start()
      End If
   End If
End Sub