The MiniBrowser and FullScreenBrowser demos have examples of those events to handle VK_F12 and VK_ESCAPE.
The CEF3 code comments for the PreKeyEvent are these :
Code: Select all
///
// Called before a keyboard event is sent to the renderer. |event| contains
// information about the keyboard event. |os_event| is the operating system
// event message, if any. Return true (1) if the event was handled or false
// (0) otherwise. If the event will be handled in on_key_event() as a keyboard
// shortcut set |is_keyboard_shortcut| to true (1) and return false (0).
///
Code: Select all
///
// Called after the renderer and JavaScript in the page has had a chance to
// handle the event. |event| contains information about the keyboard event.
// |os_event| is the operating system event message, if any. Return true (1)
// if the keyboard event was handled or false (0) otherwise.
///
http://magpcss.org/ceforum/apidocs3/pro ... ndler.html