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public frmPreview(String Title, Type ReportType, DataTable[] DataTables)
{
InitializeComponent();
crystalReportViewer1.ShowGroupTreeButton = false;
crystalReportViewer1.DisplayGroupTree = false;
ReportClass RC = (ReportClass)Activator.CreateInstance(ReportType);
DataSet DS = new DataSet();
DS.Tables.AddRange(DataTables);
RC.SetDataSource(DS);
crystalReportViewer1.ReportSource = RC;
}