You welcome.
I use it from years, as long I use IG components (from ~2003), but I used only the WinForm version, not the server version.
The code bheind approach of TXTextControl is too "engineering" and less Object Oriented, I talk about the version 13, but expect this aspect it work well and can load/save in RTF and save in PDF formats, over Word.
IMO for your final need (search text inside a Word/RTF document, and modify it) it's the ONLY WAY!
Few years ago I received a reply from IG similar that you've had today. But the problem is not Dimi, or IG's workers, is that funcionalllity is not required by many peoples, then IG dont write a control like this. … leaving the leadership to TXTextControl.
Best and have a nice WE