I recommend this ddraw.dll file:

https://github.com/narzoul/DDrawCompat/releases

I didn't make it, but I put it alongside many .exe files, and it scales them properly at high resolutions. It doesn't work for EVERYTHING, but it does for many 2000s games. Basically just makes them properly 4:3 with sharp pixels. So yeah, if you don't want to futz with DgVoodoo or anything and want your 4:3 games to be 4:3, this is a good choice. Along with the winmm.dll in the other thread, you can run it perfectly. At least in my experience. THAT IS ALL.