Ok so you'll want to make a bat file.
Just make a text file, rename it to Launch.bat (or something similar) and make sure you have file explorer set to show known file extensions when you do this or things won't work.
The most basic command to put in the file will be java -jar <the name of the forge universal> nogui this will launch the server as if you clicked on it but without the GUI, you can still see messages from the server and run commands through the cmd window though.
Note though that this will only give your server the default amount of ram which may not be enough, to give it more you will need to put the memory arguments -Xmx (and -Xms) before the -jar argument. With the memory arguments you will specify the amount of memory using a number and a one-letter-unit (K for KB, G for GB, etc.) with no space.
The typical launch command I use is java -Xms4G -Xmx4G -jar <forge universal> nogui. I make no promises of this being the best or most efficient configuration, but you can take it as an example of the syntax.