Play with objective-c under apple virtual system 10.6.6.i, in Xcode implementation.

Here, keyboard mapping picture.

References:

1,from Apple Support Site of KeyBoard Comparsion and Creating and using your own input method

2,references book for key mapping, from “uncle ling” – KeyMappingRule

⌃ = control ⌘ = command ⌥ = option ⇧ = shift

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