[OFF TOPIC] Windows 10 and DirectX 12

Sorry for my ignorance in this field. So, Microsoft said goodbye to Windows 7 and 8 and released Windows 10 with the support of DX12 APIs… If I developed a 3D application with DX9 on Win7; would it run on Win10? What about backward compatibility?
PS. What version of DX does Panda3D use?

I see no reason why DirectX 9 programs couldn’t run in Windows 10.

Panda3D primarily uses OpenGL, which does not depend on a particular version of Windows, so this shouldn’t be an issue. Panda3D can run in DirectX 9 mode, but it’s not as full-featured as the OpenGL mode.