Runs a windows shortcut with the same base filename as this executable. I used this to make Steam launch Skyrim via a shortcut to Mod Organizer 2, which I use to load my mods for the game. You might find a similar use for it.
SkyrimSELauncher.exe <- this program SkyrimSELauncher.lnk <- the shortcut that will be run
Feel free to use/copy/whatever this how you please. For the sake of formality, refer to the Unlicense.