Delphi had a powerful and easy to use GUI editor in the early 2000s, much less of a hassle compared to building software with Windows' own C++ API.
I remember borrowing a book that had it on a cd, it already had the GUI editor, this must have been around 1997 or so.
As a kid I remember I was lost in all that OOP, window handles and stuff, and could never do anything. Delphi was like assembling Lego. Very similar to QtCreator.