FastReport（预览，修改，打印）

预览

       reports_fm.frxReport1.Clear;
       reports_fm.frxreport1.loadfromfile(ExtractFilepath('reports/')+rztreeview1.Selected.Text);
       if reports_fm.frxreport1.PrepareReport then
       reports_fm.frxreport1.ShowReport;

//修改

        reports_fm.frxreport1.loadfromfile(ExtractFilepath('reports/')+rztreeview1.Selected.Text);
        reports_fm.frxReport1.DesignReport;