How to provide Css in Crystal report at runtime for each object in c# win-forms?

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C#

I want to set css for a reprot named FinalReport
as
--- FinalReport.SetCssClass(scope, styleName);

or

like

case ReportObjectKind.BoxObject:
                      rptobj.ObjectFormat.CssClass = "TrialReport";
                      break;
                  case ReportObjectKind.ChartObject:
                      rptobj.ObjectFormat.CssClass = "TrialReport";
                      break;
                  case ReportObjectKind.CrossTabObject:
                      rptobj.ObjectFormat.CssClass = "TrialReport";
                      break;
                  case ReportObjectKind.FieldHeadingObject:
                      rptobj.ObjectFormat.CssClass = "TrialReport";
                      break;

how to Shrink a Crystal Report, which is just 3-4 lines more than a page ,programmatically?
All these tasks are required to provide functionality to change font and save paper