UO.Key
From OpenEUO
UO.Key(key[,bctrl,balt,bshift])
Sends a keystroke to the client. Key can be modified by CTRL, ALT, and or SHIFT by providing the optional boolean parameters.
The key-specifier string key can be A-Z, 0-9, F1-F12 and ESC, BACK, TAB, ENTER, PAUSE, CAPSLOCK, SPACE, PGDN, PGUP, END, HOME, LEFT, RIGHT, UP, DOWN, PRNSCR, INSERT, DELETE, NUMLOCK or SCROLLLOCK.