DOS legacy application with USB printer
问题 I have the unfortunate task of doing (minimal) maintenance work on two legacy applications developed in DBIII+/Clipper '87. I have full access to source and a minimal toolchain to recompile the application when needed, but I am not allowed to reimplement it from scratch due to various (mostly psychological) reasons from the main user. Anyway, while the applications work fine under XP, hardware support is becoming a chore. The user needs to replace the failing printer (an old impact HP with