With the Emoji Menu in Windows it is possible to use emojis or smileys in documents, e-mails or in all imaginable input fields in Windows.
The Emoji Menu is accessed with the following keyboard shortcut or key combination:
Windows key + . (dot)
Now the desired emoji can be selected with the mouse and used in the respective document!
For a complete list of all keyboard shortcuts for Windows, you can also have a look here!