Import a document in *.dwx format

Question:
How is it possible to import a document in the *.dwx format that was introduced with DocuWare 6.9.

Answer:
Prerequisite is an object "uploadFile" of the type "FileInfo" and "FileCabinet" object named "actualFC which represents the target file cabinet".

ImportResult importResult = actualFC.EasyImportArchive(uploadFile, new ImportSettings());