How do I emulate a keystroke in DOS programatically (in C/C++)?

Answer 1

What do you mean by emulate???

If you actually want to write the keystroke to the keyboard buffer, you will have to

post a windows message or create an EVENT object/data structure, populate it,

and post it so the OS will process it.

In order to do that, you will need to read your windows documentation and find

the class or data objects that allow event posting or message processing.

Microsoft hijacked a lot of DOS functionality, so you may have to go through DOS-box.

============================================================

If you are just interested in the "smoke and mirrors", you can use

getchar() , getch() or getche() to read the input one character at a time

and output it to whatever "BUFFER" you like

They're in stdio.h

One of them turns off the echo so that whatever key is pressed does not get displayed.