Now, I am using Windows 8 and have made Arduino buttons to operate as an keyboard's 4 arrow keys(up,down, right and left). From this moment, I am going to send this keyboard input event out to the USB port or 9-pin serial port(RS232) installed on the backside of a desktop.
I guess I may need to use windows header and serial communication but thoroughly have no idea, what program or language(C is preferred.) do I have to use. Also even a hardware connection.
Could I get a insight for my goal?