Hello,
I think you should re-consider the way you handle the "accept key" in you application.
With Genero, the "accept" key is typically [Enter]/[Return] and it should be available, to follow GUI standards.
Instead of starting a long discussion in this forum, may I suggest that you contact your support for assistance on your TUI to GUI migration project? There are certainly other areas you need to review...
You should also have a look at this upgrade guide:
https://4js.com/online_documentation/fjs-fgl-manual-html/?path=fjs-fgl-manual#c_fgl_Mig0000_001.htmlSeb