Comment by dstaley

It's a little bit more complicated. Sure, if you're doing low-level programming I imagine you might run into the Win32 API, but if you're just building typical desktop applications (particularly for newer devices like the Surface Pro X or Surface Neo), you'll most likely want to use UWP. Usage of Win32 for app development is only going to decrease overtime for typical consumer applications. I'm sure businesses will continue building LOB apps in WPF and WinForms until the heat-death of the universe, but there's also businesses building apps in VB6 and you don't see many people recommending to learn that.