windows 7 trigger or remap shortcuts

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http://superuser.com – Is it possible to remap Windows shortcuts or trigger "key pressed" events programmatically? E.g. when I press F11, the program would simulate Windows+D and Desktop will be shown. I wouldn't like to use third-party software because it might contain a keylogger and steal my passwords. (Or are there any open-souce tools available?) (HowTos)