Unfortunately it is not possible to configure the settings of this export screen using the com object. That said, you can manually manage the export process rather than using this screen. For instance, if you want to export the report to a PDF file, where the export file name is contained in the variable ipcExportName, you could use the following procedure.
PROCEDURE ExportReport :
/*------------------------------------------------------------------------------
Purpose: Exports the report to a pdf file.
Parameters: <none>
Notes:
------------------------------------------------------------------------------*/
DEFINE VARIABLE hExportObj AS COM-HANDLE NO-UNDO.
DEFINE VARIABLE hReport AS COM-HANDLE NO-UNDO.
DEFINE VARIABLE hPages AS COM-HANDLE NO-UNDO.
hReport = PAReports:Report.
hPages = hReport:Pages.
CREATE ""ActiveReportsPDFExport.ARExportPDF"" hExportObj.
/* Filename is the name of the file to export to */
hExportObj:FileName = ipcExportName.
/* Do not embed fonts, ensures support for UNICODE chars */
hExportObj:semiDelimitedNeverEmbedFonts = """".
/* Acrobat version is the version of the acrobat file, valid values are..
0 = Adobe Acrobat Reader 2.1, without compression
1 = Adobe Acrobat Reader 3.0, with compression
2 = Adobe Acrobat Reader 4.0, with compression */
hExportObj:AcrobatVersion = 2.
/* JPGQuality sets the quality of images exported to PDF. Range: 0 -100 */
hExportObj:JPGQuality = 100.
hExportObj:Export(hPages).
END PROCEDURE.
The same can be done with each export type. If you would like more examples, just let me know.