What sort of formatting jobs? Many formats already have hotkeys assigned.
Most formatting is best applied using a style, and you can easily assign a
hotkey to a style using Tools | Customize. See
http://www.mvps.org/word/FAQs/Customization/AsgnCmdOrMacroToHotkey.htm
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Suzanne S. Barnhill
Microsoft MVP (Word)

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Words into Type
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> Hi,All,
>
> I try to define some hot-keys to do some formatting jobs
> in WORD. What should I do for this purpose? Thank you.