Export Comments into a FDF-File with VBA

Hello,

does anybody know, how I export PDF-Comments into a FDF-File - not manually but automatically with an Excel-VBA-Application. (The manual way I know)

I use AdobeAcrobat and I have activated the "Adobe Acrobat 11.0 type library" in my Excel-Version.

Im also familiar with opening a PDF-Document within an Excel-Application, but I dont know further commands to reach my aim.

With Activating another Library "AFormAut 1.0 Type library", there is a command like "ExportasFDF" - but this command is only for exporting fields of forms into a FDF-File - not PDF-comments.

Thanks in advance

Pepe