[simion314]

Thanks for trying to respond, it was clear to me that Delphi is similar with Qt ,Java and .Net and encapsulates platform specific stuff in OOP components. My question was why Delphi over C# ? The answer seems to be that if you don't want or can't use the .Net runtime dependency, or maybe if you want small binary size or small memory usage.

My conclusion is that for Windows only GUI there is no major advantage in favor of Delphi, .Net has more tools and libraries. For cross platform it seems Delphi has a superior story though with official support for GUIs on major platforms so is more similar to the Qt Toolkit (Qt also includes a GUI designer and non GUI related components).