Read Keyboard Buffer and Execute System Files (TURBOC++ OR VISUALC++)

Revision 2
Here is what my project does:
Language: C++

Once the system has successfully logged-in, and this software that I am making is made to run or directly at start-up, if the user incidentally presses any of the pre-defined keys, the following function runs
"w" ===> MS Word Document
"b" ===> Default Browser
and more like shutdown, restart and opening MSPAINT, explorer, Calc and all ! ...

Addition Features:
Make the program perform a BIOS Beep that makes the user confused on what is happening.
A similar CHIME RAM BEEP can also be tried to implement.
Random movement of Cursor (to prevent the mouse from being operated)

I need help (advise on how to go about) in :
1. HOW TO READ THE KEYBOARD BUFFER EVEN WHEN MY PROGRAM IS MINIMIZED??
2. How to run System Files using the CLI ??
3. How to BIOS BEEP AND CHIME BEEP ?