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-- The 'GetFocus' function retrieves the handle of the keyboard focus
-- window associated with the thread that called the function.
-- The 'GetKeyState' function retrieves the status of the specified
-- virtual key. The status specifies whether the key is up, down,
-- or toggled (on, off - alternating each time the key is pressed).
-- The GetKeyboardState function copies the status of the 256 virtual
-- keys to the specified buffer.If the function succeeds, the return
-- value is nonzero. If the function fails, the return value is zero.
-- To get extended error information, call GetLastError
-- The 'SetFocus' function sets the keyboard focus to the specified window.
-- All subsequent keyboard input is directed to this window. The window,
-- if any, that previously had the keyboard focus loses it.
-- The `GetKeyNameText' function retrieves a string that
-- represents the name of a key
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