Also, to be clear- the custom GUI library that the IDE uses is NOT a general-purpose GUI library; it is a support library for the IDE and other BeefLang tools. A true general-purpose GUI would be quite a lot more flexible and also much more complicated... which is not something that is intended for this particular GUI library.
This is mentioned on https://www.beeflang.org/docs/corlib/ but should perhaps be more predominantly stated.