[Cross-posting to news:comp.os.msdos.misc.]
> This feature was left out from XP and onwards. Is there a utility or
> program that could do this function?? I am mainly thinking about a
> program running in full screen, as some DOS-programs do not run in a
> DOS-in-a-box window.
It should be possible to use a fully-featured PC emulation
software, such as QEMU, to run FreeDOS, and then the software in
question underneath. From the viewpoint of the host system, the
whole emulated video subsystem will reside in a window.
There's also DOSBox, which is mainly designed to run DOS games,
but may be able to run other software just as well. Similarly,
it can emulate certain video hardware "in a window."
[...]
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FSF associate member #7257