General course information

In Visual C++: Create a workspace on your local drive in a directory with a name less than 8 characters. (This will simplify things when you go into DOS.)
In Visual C++: Write and compile your program; run it to be sure everything works.
In Windows: use START / RUN / COMMAND to open a DOS window.
Go to the directory which holds your workspace. (e.g.: cd demo)
Go to the "Debug" directory (e.g. cd Debug)
List the files using dir and look for the file with the EXE suffix (e.g. demo.exe)
type the name at the prompt (e.g. z:\demo) to run