As far as I know, AutomationElementInformation has the AcceleratorKey and AccessKey properties.
Some extracts from MSDN:
AutomationElement :: AutomationElementInformation :: AcceleratorKey
A sequence of keyboard shortcuts that trigger an action associated with an item.
and
AutomationElement :: AutomationElementInformation :: AccessKey
The symbol associated with the item that is used to activate this item.
And after you can use SendKeys to simulate keystrokes.
Another way is to use keybd___event, but AFAIK, it is deprecated, and Microsoft recommends SendInput instead. Maybe this will help you.
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