Hello, I am trying to compile a C++ program, which will be at some point a Reverse Polish Notation program. I am trying to use a function called getche() . Therefore, from what I have read, I need to #include <conio.h> The problem is on my Potato system, this file is missing even though, I have installed all the C/C++ Development headers. Where is this file and why does it seem included in Micro$ofts Visual Studio ? Oliver