NSEvent (Function Key Unicodes)
enum { NSUpArrowFunctionKey = 0xF700, NSDownArrowFunctionKey = 0xF701, NSLeftArrowFunctionKey = 0xF702, NSRightArrowFunctionKey = 0xF703, NSF1FunctionKey = 0xF704, NSF2FunctionKey = 0xF705, NSF3FunctionKey = 0xF706, NSF4FunctionKey = 0xF707, NSF5FunctionKey = 0xF708, NSF6FunctionKey = 0xF709, NSF7FunctionKey = 0xF70A, NSF8FunctionKey = 0xF70B, NSF9FunctionKey = 0xF70C, NSF10FunctionKey = 0xF70D, NSF11FunctionKey = 0xF70E, NSF12FunctionKey = 0xF70F, NSF13FunctionKey = 0xF710, NSF14FunctionKey = 0xF711, NSF15FunctionKey = 0xF712, NSF16FunctionKey = 0xF713, NSF17FunctionKey = 0xF714, NSF18FunctionKey = 0xF715, NSF19FunctionKey = 0xF716, NSF20FunctionKey = 0xF717, NSF21FunctionKey = 0xF718, NSF22FunctionKey = 0xF719, NSF23FunctionKey = 0xF71A, NSF24FunctionKey = 0xF71B, NSF25FunctionKey = 0xF71C, NSF26FunctionKey = 0xF71D, NSF27FunctionKey = 0xF71E, NSF28FunctionKey = 0xF71F, NSF29FunctionKey = 0xF720, NSF30FunctionKey = 0xF721, NSF31FunctionKey = 0xF722, NSF32FunctionKey = 0xF723, NSF33FunctionKey = 0xF724, NSF34FunctionKey = 0xF725, NSF35FunctionKey = 0xF726, NSInsertFunctionKey = 0xF727, NSDeleteFunctionKey = 0xF728, NSHomeFunctionKey = 0xF729, NSBeginFunctionKey = 0xF72A, NSEndFunctionKey = 0xF72B, NSPageUpFunctionKey = 0xF72C, NSPageDownFunctionKey = 0xF72D, NSPrintScreenFunctionKey = 0xF72E, NSScrollLockFunctionKey = 0xF72F, NSPauseFunctionKey = 0xF730, NSSysReqFunctionKey = 0xF731, NSBreakFunctionKey = 0xF732, NSResetFunctionKey = 0xF733, NSStopFunctionKey = 0xF734, NSMenuFunctionKey = 0xF735, NSUserFunctionKey = 0xF736, NSSystemFunctionKey = 0xF737, NSPrintFunctionKey = 0xF738, NSClearLineFunctionKey = 0xF739, NSClearDisplayFunctionKey = 0xF73A, NSInsertLineFunctionKey = 0xF73B, NSDeleteLineFunctionKey = 0xF73C, NSInsertCharFunctionKey = 0xF73D, NSDeleteCharFunctionKey = 0xF73E, NSPrevFunctionKey = 0xF73F, NSNextFunctionKey = 0xF740, NSSelectFunctionKey = 0xF741, NSExecuteFunctionKey = 0xF742, NSUndoFunctionKey = 0xF743, NSRedoFunctionKey = 0xF744, NSFindFunctionKey = 0xF745, NSHelpFunctionKey = 0xF746, NSModeSwitchFunctionKey = 0xF747 };