I need to mention here that the book does not go into Windows programming, OOP, software components, or the Lazarus GUI builder. There are other free resources out there, such as this course in Modern ...

It supports a wide variety of toolkits for GUI programming, as the project wiki shows: Win32, Gtk2 and work-in-progress Gtk3, and Qt versions 4, 5 and 6, among others.

I need to mention here that the book does not go into Windows programming, OOP, software components, or the Lazarus GUI builder. There are other free resources out there, such as this course in Modern ...