CR10: Exporting in Excel with column width based on details

[SuperDude99]

I'm trying to export my reports in Excel format using the CR10 version
with the "Column width based on objects in the Details" option.

I've been able to do it in CR11, but for some reasons I am restricted
to use CR10 in that project.

Working in CR11 (note code is in c#, hoping it's no problem):

ReportClientDocument crReportDocument;
crReportDocument = new ReportClientDocument();
crReportDocument.ReportAppServer =
ConfigurationSettings.AppSettings["ServeurRAS"];
filename = "rassdk://" + this.m_applicationPath + "Rapports\\" +
this.m_fichierRapport;
crReportDocument.Open( ref filename, 1 );
SetFormulaFields( crReportDocument );
crReportDocument.DatabaseController.SetDataSource(
DataSetConverter.Convert(ds),
crReportDocument.Database.Tables[0].Alias, ds.Tables[0].TableName );
PrintOutputController ctrl = crReportDocument.PrintOutputController;
CrystalDecisions.ReportAppServer.CommonObjectModel.ByteArray byteArray
= null;

ExcelExportFormatOptions excelOptions = new ExcelExportFormatOptions();
excelOptions.BaseAreaType =
CrAreaSectionKindEnum.crAreaSectionKindDetail;
ExportOptions exportExcel = new ExportOptions();
exportExcel.ExportFormatType=
ReportExportFormatEnum.crReportExportFormatMSExcel
exportExcel.FormatOptions = excelOptions;
byteArray = ctrl.ExportEx(exportExcel);

CR10:

There is no ExportEx method attached to the PrintOutputController
object. I am using

byteArray = ctrl.Export(
CrReportExportFormatEnum.crReportExportFormatMSExcel, 1);

Anybody has an idea on how it could set the excel options in can set in
CR11?

Thanks!