In Visual Studio 14 CTP4 you can still File -> New VB / C# Project -> Windows Forms in same as you could ten years ago, but with the next generation CLR in the new IDE.
It's still _supported_ and there are a ton of vendors still shipping components.
Abandoned/EOL/Discontinued is something like FoxPro or Apple's Rosetta emulator.
It's not even deprecated.
Sure you can. But you are locked into a framework that reached its peak a few years ago. It's like writing HTML that's compatible with IE6. You can do this and it works but you are stuck in the past.