Is there a version of Ada for Windows?
Yes There is a free as in liberty and beer Win32 compiler available from http://libre.act-europe.fr/GNAT/. A supported version of that compiler is available from AdaCore Technologies at http://www.gnat.com A Visual Studio Style produce called ObjectAda is available from Aonix RR Software sells Janus/Ada along with CLAW a think binding to Windows and a CLAW GUI builder.