private void button1_Click(object sender, EventArgs e)
        {
            this.radGridView1.PrintSettingsDialogFactory = new CustomGridViewPrintSettingsDialogFactory();

            GridPrintStyle style = new GridPrintStyle();
            style.PrintHierarchy = true;
            style.HierarchyIndent = 0;
            style.ChildViewPrintMode = ChildViewPrintMode.SelectViewToPrint;
            this.radGridView1.PrintStyle = style;

            this.radGridView1.PrintPreview();
        }

        public class CustomGridViewPrintSettingsDialog : GridViewPrintSettingsDialog
        {
            public CustomGridViewPrintSettingsDialog(RadPrintDocument document) : base(document)
            {
            }

            protected override void LoadSettings()
            {
                base.LoadSettings();

                RadGridView gridView = this.PrintDocument.AssociatedObject as RadGridView;
                this.printStyleSettingControl.PrintStyle.HierarchyIndent = gridView.PrintStyle.HierarchyIndent;
            }
        }

        public class CustomGridViewPrintSettingsDialogFactory : IPrintSettingsDialogFactory
        {
            public Form CreateDialog(RadPrintDocument document)
            {
                return new CustomGridViewPrintSettingsDialog(document);
            }
        }