| Migrating from IBM Informix 4gl to Genero BDL / User interface topics | |
IBM® Informix® 4GL (I4GL) and Genero Business Development Language (BDL) handle windows and form content rendering differently. I4GL is designed to write applications for for dumb terminals, while Genero BDL uses real GUI rendering, with resizeable windows and proportional fonts. To simplify migration from TUI-style products, Genero BDL supports the traditional GUI mode.