import xml into pdf form in C

I need to populate PDF form with XML data - similarly to the Adobe Reader's 'import xml' functionality.

I have searched for an API which would allow me to do this in C but found nothing. After checking the Adobe Acrobat SDK I realized it is dedicated mostly to JavaScript. The Acrobat Interapplication Communication section contains a function importAnFDF - but no importAnXFDF function as in the JavaScript part of the API.

Is there any way to import XML data to PDF forms using C?

Note: The PDF file which I need to fill with the XML data was created with ADEP Document Services - Designer 10.0 (that's what the document description in Adobe Reader XI says).