The PP_InputEvent_Key struct represents a key up or key down event.

Key up and key down events correspond to physical keys on the keyboard. The actual character that the user typed (if any) will be delivered in a "character" event.

If the user loses focus on the module while a key is down, a key up event might not occur. For example, if the module has focus and the user presses and holds the shift key, the module will see a "shift down" message. Then if the user clicks elsewhere on the web page, the module's focus will be lost and no more input events will be delivered.

If your module depends on receiving key up events, it should also handle "lost focus" as the equivalent of "all keys up."