Install the Arduino library as if it was any other Arduino library, read the readme.txt file, the source code, and the example sketch to see how to use it.
Install com0com, then use it to setup a pair of fake serial ports (see screenshot to see my configuration, you can use any port number you want)
Please read the source code of the library, the readme file, and the example sketch. It will help you understand how to use the library. It works mostly like HardwareSerial, so you can use print and println, along with other inherited functions.
Don't try to open COM12 using both, it won't work. Don't try to open COM13 using both, it won't work.
(You don't have to use 12 or 13, you can really use any unused number)