title: How hard would it be to port a directx 7 application to run on Windows 7?
body: <p>We had an arcade/redemption game running on Win98, but hardware which can run it has finally gone obsolete.  The game used a number of scaling effects, some through the 3D path, and played some tricks moving things in and out of video memory.  If I was to undertake porting it to run on Windows 7, how much trouble would it likely be?  Would it mostly be recompilation, or have the APIs undergone such transformation that I might as well re-write the device interfaces?</p>