ReactOS is aimed at being at free windows like OS, that will running windows programs. Some run, some don't.
I want to add, I tested QB64 in the LiveCD bootable ReactOS version, not the full install. And after more testing, it probably fails because I now see that I can't write files to my SDD using ReactOS. So I guess that's why the IDE fails to load, it can't make temp files. Also, I figure the GL version wouldn't run anyway even with disk write access. But since the SDL compiled exe's do run, I'd guess the QB64 SDL IDE would start if it had disk write access. My IDE work under ReactOs. Maybe if I install the full OS I could get QB64 SDL to run and compile.
I'm not not too serious about doing this, but did always wonder about running QB64 under ReactOS, so that's why I tried it.
- Dav