How to hide the row and column headers when printing or print previewing in WinForms GridControl?

//When the button is clicked, the print operation is performed.
private void btnPrint_Click(object sender, EventArgs e)
{
    //Disables PrintRowHeader to hide the row header while printing.
    this.gridControl1.Model.Properties.PrintRowHeader = false;
    //Disables PrintColHeader to hide the column header while printing.
    this.gridControl1.Model.Properties.PrintColHeader = false;
    try
    {
        GridPrintDocument gpd = new GridPrintDocument(gridControl1, true);
        PrintPreviewDialog ppd = new PrintPreviewDialog();
        ppd.Document = gpd;
        if (ppd.ShowDialog() == DialogResult.OK)
        {
            //Displays the print or printpreview dialog.
            gpd.Print();
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show("error occured" + ex.Message);
    }
}

'When the button is clicked, the print operation is performed.
Private Sub btnPrint_Click(ByVal sender As Object, ByVal e As EventArgs)
    'Disables PrintRowHeader to hide the row header while printing.
    Me.gridControl1.Model.Properties.PrintRowHeader = False
    'Disables PrintColHeader to hide the column header while printing.
    Me.gridControl1.Model.Properties.PrintColHeader = False
    Try
        Dim gpd As New GridPrintDocument(gridControl1, True)
        Dim ppd As New PrintPreviewDialog()
        ppd.Document = gpd
        If ppd.ShowDialog() = DialogResult.OK Then
            'Displays the print or printpreview dialog.
            gpd.Print()
        End If
    Catch ex As Exception
        MessageBox.Show("error occured" & ex.Message)
    End Try
End Sub