File → Import → External Import provides a mechanism for importing forms from languages other than AutoIt. This is an advanced feature.
Koda provides a stub for writing your converters, called Form Capture.au3. Until you have created a converter and placed it in the Extras\Import directory, File → Import → External Import opens Form Capture.au3 ready for editing.
When you close Form Capture.au3, this dialog shows:
If converters exist, they will be listed here.
To start conversion, click on OK.
For a converter to work, it must output to stdout, and meet the requirements stated in Extras\Import\readme.txt. All controls to be converted must be standard Windows controls.