Как то так

Код AS3:
NativeApplication.nativeApplication.addEventListener (KeyboardEvent.KEY_DOWN, nativeApplication_keyDown);
NativeApplication.nativeApplication.addEventListener (KeyboardEvent.KEY_UP, nativeApplication_keyUp);
private function nativeApplication_keyUp(e: KeyboardEvent): void
{
switch (e.keyCode)
{
case Keyboard.BACK:
e.preventDefault ();
trace ("Keyboard", "back button");
break;
case Keyboard.MENU:
e.preventDefault ();
trace ("Keyboard", "menu button");
break;
case Keyboard.SEARCH:
e.preventDefault ();
trace ("Keyboard", "search button");
break;
default:
}
}
private function nativeApplication_keyDown(e: KeyboardEvent): void
{
switch (e.keyCode)
{
case Keyboard.BACK:
case Keyboard.MENU:
case Keyboard.SEARCH:
e.preventDefault ();
break;
default:
}
}