Does anyone know how I can make a program with user interface like BIOS has? Like an API or something. I’ve seen some shops having software using an interface like BIOS has at the shop’s computer(s) for checking product availability etc. I’m talking about a UI like this: 
Does anyone know how I can make a program with user interface like BIOS
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it is called NCurses, and is basically a library to create UI interfaces in text virtual terminals
Here is a somewhat decent tutorial about how to use it
EDIT for windows platforms, you need a port library called PDCurses. I Think it relies on mingw but i can’t tell for sure since i’ve haven’t used it