I tried to find codes online about rising events in my PySimpleGUI program by simple keyboard clicks like `ENTER` or `Ctrl+A` for instance but I couldn't just find any about it, I went to the documentation of PySimpleGUI and didn't shut my tap without learning a thing.

Here is a simple code i wrote:

```
import PySimpleGUI as sg

layout = [[sg.I(key='In'), sg.B('Ok')],[sg.T(enable_events=True,key='T')]]

win=sg.Window("Keyboard Events", layout)

while True:
    event, value= win.read()
    #close event
    if event == sg.WIN_CLOSED:
        break
    #greeting evnt
    if event in ('Ok'): #( 'OK', 'KEYBOARD ENTER EVENT'):
        msg = "Hello "+value['In']  # message to show user
        win['T'].update(msg)        # show user message
        win['In'].update("")        # clear input field after submitting

win.close()

```

What should I say to PySimpleGUI for let it run `#greeting event` when I press the `ENTER` key? Can someone help me please? Thanks guys!