Auto it 键盘操作（send）

win切换窗口（键盘按下alt，操作tab键）
操作步骤如下：
AutoITLibrary.send   {ALT DOWN}
AutoITLibrary.send   {tab}
AutoITLibrary.send   {tab}
AutoItLibrary.Send   {ALT UP}

其它键盘操作，请参考：
键盘输入
    [Arguments]    ${keys} ${flag}=0
    [Documentation] 模拟键盘输入，需要两个参数：
    ... 第一个参数：需要输入的键盘按键
    ... 第二个参数：标记变量，可选值，默认为0，
    ...               0: 代表第一个参数${keys}中的!+^#代表特殊按键
    ...               1: 代表第一个参数${keys}中的所有字符都是普通字符串
    ... 举例：
    ... ^a^c^v!{F4}      代表：Ctrl+a Ctrl+c Ctrl+v Alt+F4
    ... 关于特殊按键的说明：
    ...      如果${flag}为0，则：
    ...     ! 代表ALT按键
    ...     + 代表SHIFT按键
    ...     ^ 代表CTRL按键
    ...     # 代表WIN按键
    ... 比如：!+a 代表：ALT+SHIFT+a
    ... 其他特殊按键：
    ... ${flags}为0的时候，还支持下述特殊按键：
    ...     输入最终的键盘按键
    ...     {!}                     !
    ...     {#}                     #
    ...     {+}                     +
    ...     {^}                     ^
    ...     {{}                     {
    ...     {}}                     }
    ...     {SPACE}                 SPACE
    ...     {ENTER}                 ENTER key on the main keyboard
    ...     {ALT}                   ALT
    ...     {BACKSPACE} or {BS}     BACKSPACE
    ...     {DELETE} or {DEL}       DELETE
    ...     {UP}                    Cursor up
    ...     {DOWN}                  Cursor down
    ...     {LEFT}                  Cursor left
    ...     {RIGHT}                 Cursor right
    ...     {HOME}                  HOME
    ...     {END}                   END
    ...     {ESCAPE} or {ESC}       ESCAPE
    ...     {INSERT} or {INS}       INS
    ...     {PGUP}                  PageUp
    ...     {PGDN}                  PageDown
    ...     {F1} - {F12}            Function keys
    ...     {TAB}                   TAB
    ...     {PRINTSCREEN}           Print Screen key
    ...     {LWIN}                  Left Windows key
    ...     {RWIN}                  Right Windows key
    ...     {NUMLOCK on}            NUMLOCK (on/off/toggle)
    ...     {CAPSLOCK off}          CAPSLOCK (on/off/toggle)
    ...     {SCROLLLOCK toggle}     SCROLLLOCK (on/off/toggle)
    ...     {BREAK}                 for Ctrl+Break processing
    ...     {PAUSE}                  PAUSE
    ...     {NUMPAD0} - {NUMPAD9}    Numpad digits
    ...     {NUMPADMULT}             Numpad Multiply
    ...     {NUMPADADD}              Numpad Add
    ...     {NUMPADSUB}              Numpad Subtract
    ...     {NUMPADDIV}              Numpad Divide
    ...     {NUMPADDOT}              Numpad period
    ...     {NUMPADENTER}            Enter key on the numpad
    ...     {APPSKEY}                Windows App key
    ...     {LALT}                   Left ALT key
    ...     {RALT}                   Right ALT key
    ...     {LCTRL}                  Left CTRL key
    ...     {RCTRL}                  Right CTRL key
    ...     {LSHIFT}                 Left Shift key
    ...     {RSHIFT}                 Right Shift key
    ...     {ALTDOWN}                Holds the ALT key down until {ALTUP} is sent
    ...     {SHIFTDOWN}              Holds the SHIFT key down until {SHIFTUP} is sent
    ...     {CTRLDOWN}               Holds the CTRL key down until {CTRLUP} is sent
    ...     {LWINDOWN}               Holds the left Windows key down until {LWINUP} is sent
    ...     {RWINDOWN}               Holds the right Windows key down until {RWINUP} is sent
    ...     {ASC nnnn}               Send the ALT+nnnn key combination
    AutoItLibrary.Send ${keys} ${flag}

键盘输入Alt+F4
    AutoItLibrary.Send !{F4}

键盘输入Ctrl+Space
    AutoItLibrary.Send ^{SPACE}

键盘输入Ctrl+a
    AutoItLibrary.Send ^a

键盘输入Ctrl+c
    AutoItLibrary.Send ^c

键盘输入Ctrl+v
    AutoItLibrary.Send ^v

键盘输入Ctrl+s
    AutoItLibrary.Send ^s

键盘输入Ctrl+p
    AutoItLibrary.Send ^p

键盘输入Ctrl+Home
    AutoItLibrary.Send ^{HOME}

键盘输入Ctrl+End
    AutoItLibrary.Send ^{END}

键盘输入Win+d
    键盘输入 {LWINDOWN}d{LWINUP}

键盘输入Win+r
    键盘输入 {LWINDOWN}r{LWINUP}