Exporting annotation and parameters flags

[SilviaPalpacelli]

Dear all,
I'm trying to export a neutral (*.neu) file programmatically from ProE 5 wildefire
I manage to export the file by using the following code

Dim annotationInstructions As IpfcNEUTRALFileExportInstructions = (New CCpfcNEUTRALFileExportInstructions).Create()
document.Export(neutralFileName, annotationInstructions)

However, this file does not contain annotation and parameters.

When I do the same from the interface an option panel opens up allowing the user to
enable the export of annotation and parameter, how can I set these flags into my program?

Thank you very much for your attention!

Silvia