sendkeys 的用法（MSDN）：
SendKeys 语句
将一个或多个按键消息发送到活动窗口，就如同在键盘上进行输入一样。
语法
SendKeys string[, wait]
SendKeys 语句的语法具有以下几个命名参数：
部分 描述
string 必需的。字符串表达式，指定要发送的按键消息。
Wait 可选的。指定等待方式的 BooleandefBooleanDataType@veendf98.chm 值。如果为 False（缺省值），则控件在按键发送出去之后立刻返回到过程。如果为 True，则按键消息必须在控件返回到过程之前加以处理。
说明
每个按键由一个或多个字符表示。为了指定单一键盘字符，必须按字符本身的键。例如，为了表示字母 A，可以用 "A" 作为 string。为了表示多个字符，就必须在字符后面直接加上另一个字符。例如，要表示 A、B 及 C，可用 "ABC" 作为 string。
对 SendKeys 来说，加号 (+)、插入符 (^)、百分比符号 (%)、上划线 (~) 及圆括号 ( ) 都具有特殊意义。为了指定上述任何一个字符，要将它放在大括号 ({}) 当中。例如，要指定正号，可用 {+} 表示。方括号 ([ ]) 对 SendKeys 来说并不具有特殊意义，但必须将它们放在大括号中。在其它应用程序中，方括号有特殊意义，在出现动态数据交换 (DDE) 的时候，它可能具有重要意义。为了指定大括号字符，请使用 {{} 及 {}}。
为了在按下按键时指定那些不显示的字符，例如 ENTER 或 TAB 以及那些表示动作而非字符的按键，请使用下列代码：
按键 代码
BACKSPACE {BACKSPACE}, {BS}, 或 {BKSP}
BREAK {BREAK}
CAPS LOCK {CAPSLOCK}
DEL or DELETE {DELETE} 或 {DEL}
DOWN ARROW {DOWN}
END {END}
ENTER {ENTER}或 ~
ESC {ESC}
HELP {HELP}
HOME {HOME}
INS or INSERT {INSERT} 或 {INS}
LEFT ARROW {LEFT}
NUM LOCK {NUMLOCK}
PAGE DOWN {PGDN}
PAGE UP {PGUP}
PRINT SCREEN {PRTSC}
RIGHT ARROW {RIGHT}
SCROLL LOCK {SCROLLLOCK}
TAB {TAB}
UP ARROW {UP}
F1 {F1}
F2 {F2}
F3 {F3}
F4 {F4}
F5 {F5}
F6 {F6}
F7 {F7}
F8 {F8}
F9 {F9}
F10 {F10}
F11 {F11}
F12 {F12}
F13 {F13}
F14 {F14}
F15 {F15}
F16 {F16}
为了指定那些与 SHIFT、CTRL 及 ALT 等按键结合的组合键，可在这些按键码的前面放置一个或多个代码，这些代码列举如下：
按键 代码
SHIFT +
CTRL ^
ALT %
为了说明在按下其它按键时应同时按下 SHIFT、CTRL、及 ALT 的任意组合键，请把那些按键的码放在括号当中。例如，为了说明按下 E 与 C 的时候同时按下 SHIFT 键，请使用 "+(EC)"。为了说明在按下 E 的时候同时按下 SHIFT 键，但接着按 C 而不按 SHIFT，则使用 "+EC"。
为了指定重复键，使用 {key number} 的形式。必须在 key 与 number 之间放置一个空格。例如，{LEFT 42} 意指 42 次按下 LEFT ARROW 键；{h 10} 则是指 10 次按下 H 键。
注意 不能用 SendKeys 将按键消息发送到这样一个应用程序，这个应用程序并没有被设计成在 Microsoft Windows 中运行。Sendkeys 也无法将 PRINT SCREEN 按键 {PRTSC} 发送到任何应用程序。
我們如果想發送鍵盤命令，可以用 SENDKEYS ，但要发送 WINDOWS 微标键怎么做？（MSDN中没有给出WINDOWS键 的键码）下面是可以执行的代码：
Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Private Const VK_LWIN = &H5B 'Left Windows key (Microsoft Natural keyboard)
Private Const VK_RWIN = &H5C 'Right Windows key (Natural keyboard)
Private Sub Command1_Click() 'left windows
keybd_event VK_LWIN, 0, &H1, 0
keybd_event VK_LWIN, 0, &H2, 0
End Sub
Private Sub Command2_Click() 'right windows
keybd_event VK_RWIN, 0, &H1, 0
keybd_event VK_RWIN, 0, &H2, 0
End Sub
详细的解释可参看SENDKEYS 类（http://www.vbaccelerator.com/home/VB/Tips/SendKeys_using_the_API/SendKeys_Demonstration_zip_cSendKeys_cls.asp）：
vbAccelerator - Contents of code file: cSendKeys.clsVERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
END
Attribute VB_Name = "cSendKeys"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit
Public Enum MoreKeyConstants
VK_LWIN = &H5B 'Left Windows key (Microsoft Natural keyboard)
VK_RWIN = &H5C 'Right Windows key (Natural keyboard)
VK_APPS = &H5D 'Applications key (Natural keyboard)
VK_SLEEP = &H5F 'Computer Sleep key
VK_RMENU = &HA5 ' Right MENU key
VK_BROWSER_BACK = &HA6 'Windows 2000/XP: Browser Back key
VK_BROWSER_FORWARD = &HA7 'Windows 2000/XP: Browser Forward key
VK_BROWSER_REFRESH = &HA8 'Windows 2000/XP: Browser Refresh key
VK_BROWSER_STOP = &HA9 'Windows 2000/XP: Browser Stop key
VK_BROWSER_SEARCH = &HAA 'Windows 2000/XP: Browser Search key
VK_BROWSER_FAVORITES = &HAB 'Windows 2000/XP: Browser Favorites key
VK_BROWSER_HOME = &HAC 'Windows 2000/XP: Browser Start and Home key
VK_VOLUME_MUTE = &HAD 'Windows 2000/XP: Volume Mute key
VK_VOLUME_DOWN = &HAE 'Windows 2000/XP: Volume Down key
VK_VOLUME_UP = &HAF 'Windows 2000/XP: Volume Up key
VK_MEDIA_NEXT_TRACK = &HB0 'Windows 2000/XP: Next Track key
VK_MEDIA_PREV_TRACK = &HB1 'Windows 2000/XP: Previous Track key
VK_MEDIA_STOP = &HB2 'Windows 2000/XP: Stop Media key
VK_MEDIA_PLAY_PAUSE = &HB3 'Windows 2000/XP: Play/Pause Media key
VK_LAUNCH_MAIL = &HB4 'Windows 2000/XP: Start Mail key
VK_LAUNCH_MEDIA_SELECT = &HB5 'Windows 2000/XP: Select Media key
VK_LAUNCH_APP1 = &HB6 'Windows 2000/XP: Start Application 1 key
VK_LAUNCH_APP2 = &HB7 'Windows 2000/XP: Start Application 2 key
VK_OEM_1 = &HBA 'Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the ';:' key
VK_OEM_PLUS = &HBB 'Windows 2000/XP: For any country/region, the '+' key
VK_OEM_COMMA = &HBC 'Windows 2000/XP: For any country/region, the ',' key
VK_OEM_MINUS = &HBD 'Windows 2000/XP: For any country/region, the '-' key
VK_OEM_PERIOD = &HBE 'Windows 2000/XP: For any country/region, the '.' key
VK_OEM_2 = &HBF 'Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the '/?' key
VK_OEM_3 = &HC0 'Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the '`~' key
' C1D7 Reserved
' D8DA Unassigned
VK_OEM_4 = &HDB 'Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the '[{' key
VK_OEM_5 = &HDC 'Used for miscellaneous characters; it can vary by keyboard.
Windows 2000/XP: For the US standard keyboard, the '\|' key
VK_OEM_6 = &HDD 'Used for miscellaneous characters; it can vary by keyboard
Windows 2000/XP: For the US standard keyboard, the ']}' key
VK_OEM_7 = &HDE ' Used for miscellaneous characters; it can vary by
keyboard. Windows 2000/XP: For the US standard keyboard, the
'single-quote/double-quote' key
VK_OEM_8 = &HDF 'Used for miscellaneous characters; it can vary by keyboard.
E0 Reserved
'- E1 OEM specific
VK_OEM_102 = &HE2 'Windows 2000/XP: Either the angle bracket key or the
backslash key on the RT 102-key keyboard
' E3E4 OEM specific
VK_PROCESSKEY = &HE5 'Windows 95/98/Me, Windows NT 4.0, Windows 2000/XP: IME
PROCESS key
' E6 OEM specific
VK_PACKET = &HE7 'Windows 2000/XP: Used to pass Unicode characters as if
they were keystrokes. The VK_PACKET key is the low word of a 32-bit Virtual
Key value used for non-keyboard input methods. For more information, see
Remark in KEYBDINPUT, SendInput, WM_KEYDOWN, and WM_KEYUP
' E8 Unassigned
' E9F5 OEM specific
VK_ATTN = &HF6 'Attn key
VK_CRSEL = &HF7 'CrSel key
VK_EXSEL = &HF8 'ExSel key
VK_EREOF = &HF9 'Erase EOF key
VK_PLAY = &HFA 'Play key
VK_ZOOM = &HFB 'Zoom key
VK_NONAME = &HFC 'Reserved for future use
VK_PA1 = &HFD 'PA1 key
VK_OEM_CLEAR = &HFE 'Clear key
End Enum
Private m_colKeyMap As New Collection
Private Declare Sub keybd_event Lib "user32" ( _
ByVal bVk As Byte, ByVal bScan As Byte, _
ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Private Const KEYEVENTF_EXTENDEDKEY = &H1
Private Const KEYEVENTF_KEYUP = &H2
Private Declare Function GetVersion Lib "kernel32" () As Long
Private Declare Function VkKeyScan Lib "user32" Alias "VkKeyScanA" ( _
ByVal cChar As Byte) As Integer
Private Declare Function VkKeyScanW Lib "user32" ( _
ByVal cChar As Integer) As Integer
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" ( _
lpvDest As Any, lpvSource As Any, ByVal cbCopy As Long)
Private Function nextChar(ByRef sString As String, ByVal iPos As Long, Optional
ByVal lLen As Long = 0) As String
If (lLen = 0) Then lLen = Len(sString)
If (iPos + 1 0) Then
sChar = colBrace(colBrace.Count)
' send key up
Select Case sChar
Case "+"
KeyUp vbKeyShift
Case "~"
KeyUp vbKeyControl
Case "%"
KeyUp vbKeyMenu
End Select
colBrace.Remove colBrace.Count
iPos = iPos + 1
Else
' Invalid sendkeys command:
sMsg = "Invalid sendkeys command: unmatched ) at position " & iPos
GoTo errorHandler
End If
Case "{"
' special key
If (iPos + 2 iLen) Then
sMsg = "Invalid sendkeys command; opening { without content or
closing } at position " & iPos
GoTo errorHandler
Else
iNextPos = InStr(iPos + 2, sKeys, "}")
If (iNextPos = 0) Then
sMsg = "Invalid sendkeys command; opening { without closing } at
position " & iPos
GoTo errorHandler
Else
sContent = Mid$(sKeys, iPos + 1, iNextPos - iPos - 1)
iPos = iNextPos + 1
' is this a key/presses pair?
iNextPos = InStr(sContent, " ")
If (iNextPos 0) Then
sKey = Left$(sContent, iNextPos - 1)
sCount = Mid$(sContent, iNextPos + 1)
If Not (IsNumeric(sCount)) Then
sMsg = "Invalid sendkeys command; key repetitions '" &
sCount & "' is invalid near position " & iPos
lCount = CLng(sCount)
End If
Else
sKey = sContent
lCount = 1
End If
KeyPress sKey, lCount
End If
End If
Case Else
' send the key as is
KeyPress sChar, 1
iPos = iPos + 1
End Select
Loop
If (colBrace.Count 0) Then
sMsg = "Invalid sendkeys command: more open brackets than close brackets."
GoTo errorHandler
End If
Exit Sub
errorHandler:
If Len(sMsg) = 0 Then
sMsg = Err.Description
lErr = Err.Number
End If
' If we don't clear up the shift/control/alt keys,
' then you might find other apps on the system are hard to
' use.
' Make sure you have Break on Unhandled Errors switched
' on.
Do While colBrace.Count 0
sChar = colBrace(colBrace.Count)
' send key up
Select Case sChar
Case "+"
KeyUp vbKeyShift
Case "~"
KeyUp vbKeyControl
Case "%"
KeyUp vbKeyMenu
End Select
colBrace.Remove colBrace.Count
Loop
On Error GoTo 0
Err.Raise lErr, App.EXEName & ".cSendKeys", sMsg
Exit Sub
End Sub
Public Sub KeyPress(ByVal sKey As String, Optional ByVal lCount = 1)
Dim vKey As KeyCodeConstants
Dim l As Long
On Error Resume Next
vKey = m_colKeyMap(sKey)
On Error GoTo 0
If (vKey = 0) Then
' translate string into v key code
vKey = KeyCode(sKey)
End If
If (vKey 0) Then
For l = 1 To lCount
KeyDown vKey
KeyUp vKey
Next l
Else
Err.Raise 9, , "Key " & sKey & " could not be interpreted."
End If
End Sub
Public Sub KeyDown(ByVal vKey As KeyCodeConstants)
keybd_event vKey, 0, KEYEVENTF_EXTENDEDKEY, 0
End Sub
Public Sub KeyUp(ByVal vKey As KeyCodeConstants)
keybd_event vKey, 0, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0
End Sub
Public Function KeyCode(ByVal sChar As String) As KeyCodeConstants
Dim bNt As Boolean
Dim iKeyCode As Integer
Dim b() As Byte
Dim iKey As Integer
Dim vKey As KeyCodeConstants
Dim iShift As ShiftConstants
' Determine if we have Unicode support or not:
bNt = ((GetVersion() And &H80000000) = 0)
' Get the keyboard scan code for the character:
If (bNt) Then
b = sChar
CopyMemory iKey, b(0), 2
iKeyCode = VkKeyScanW(iKey)
Else
b = StrConv(sChar, vbFromUnicode)
iKeyCode = VkKeyScan(b(0))
End If
KeyCode = (iKeyCode And &HFF&)
End Function
Private Sub Class_Initialize()
m_colKeyMap.Add vbKeyBack, "BACKSPACE"
m_colKeyMap.Add vbKeyBack, "BS"
m_colKeyMap.Add vbKeyBack, "BKSP"
m_colKeyMap.Add vbKeyPause, "BREAK"
m_colKeyMap.Add vbKeyCapital, "CAPSLOCK"
m_colKeyMap.Add vbKeyDelete, "DELETE"
m_colKeyMap.Add vbKeyDelete, "DEL"
m_colKeyMap.Add vbKeyDown, "DOWN"
m_colKeyMap.Add vbKeyEnd, "END"
m_colKeyMap.Add vbKeyReturn, "ENTER"
m_colKeyMap.Add vbKeyReturn, "~"
m_colKeyMap.Add vbKeyEscape, "ESC"
m_colKeyMap.Add vbKeyHelp, "HELP"
m_colKeyMap.Add vbKeyHome, "HOME"
m_colKeyMap.Add vbKeyInsert, "INS"
m_colKeyMap.Add vbKeyInsert, "INSERT"
m_colKeyMap.Add vbKeyLeft, "LEFT"
m_colKeyMap.Add vbKeyNumlock, "NUMLOCK"
m_colKeyMap.Add vbKeyPageDown, "PGDN"
m_colKeyMap.Add vbKeyPageUp, "PGUP"
m_colKeyMap.Add vbKeyPrint, "PRTSC"
m_colKeyMap.Add vbKeyRight, "RIGHT"
m_colKeyMap.Add vbKeyScrollLock, "SCROLLLOCK"
m_colKeyMap.Add vbKeyTab, "TAB"
m_colKeyMap.Add vbKeyUp, "UP"
m_colKeyMap.Add vbKeyF1, "F1"
m_colKeyMap.Add vbKeyF2, "F2"
m_colKeyMap.Add vbKeyF3, "F3"
m_colKeyMap.Add vbKeyF4, "F4"
m_colKeyMap.Add vbKeyF5, "F5"
m_colKeyMap.Add vbKeyF6, "F6"
m_colKeyMap.Add vbKeyF7, "F7"
m_colKeyMap.Add vbKeyF8, "F8"
m_colKeyMap.Add vbKeyF9, "F9"
m_colKeyMap.Add vbKeyF10, "F10"
m_colKeyMap.Add vbKeyF11, "F11"
m_colKeyMap.Add vbKeyF12, "F12"
m_colKeyMap.Add vbKeyF13, "F13"
m_colKeyMap.Add vbKeyF14, "F14"
m_colKeyMap.Add vbKeyF15, "F15"
m_colKeyMap.Add vbKeyF16, "F16"
End Sub
