Python project modification

I'm designing some software to help people with accessibility issues (visual and physical impairment). The task involves the open-source screen reader NVDA ([login to view URL]) which is written in Python. NVDA is reasonably easy to build, however, git, python and VS2017 are required. ([login to view URL] The information needed is the position of the text input "caret", and the words/characters surrounding it. (An interface has already been created using a TCP client/server arrangement, and this has been used to extract the speech output text successfully. The complex logic is on the destination C# side with TCP listeners running in a background thread; when there's a context change NVDA sends the details in the TCP request string.) The task is to implement the same thing with the 'POSITION_CARET' as referenced in [login to view URL], [login to view URL], [login to view URL] and _init.py. [login to view URL] The expected lines are not being hit, it could be an issue of object scope or some simple gotcha... my C# developer thinks he's close to a solution but is busy with another part of the project, so it's time to bring in a python expert... someone familiar with the python debugger/profiler to help get this working and provide future assistance. It could be that a better way of interfacing C# with NVDA exists also, so wider experience would be useful. I'd suggest that anyone interested has used this toolset before (VS2017)