>>Do all these examples demonstrate that different applications are compiled with different UI Frameworks that are all in use and supported? yes, examples incl

>>Do all these examples demonstrate that different applications are compiled with different UI Frameworks that are all in use and supported? yes, examples include win32, mfc, wpf, winui 2, winui 3 are all UI frameworks that MS has released over the years, all of which are still in active use, some more than others. For example, WPF is probably one of the most widely used, even though MS keeps trying to kill it.