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 or Macintosh中运行。Sendkeys 也无法将 PRINT SCREEN 按键 {PRTSC} 发送到任何应用程序。
我们如果想发送键命令，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 windowskeybd_event VK_LWIN, 0, &H1, 0keybd_event VK_LWIN, 0, &H2, 0End SubPrivate Sub Command2_Click() 'right windowskeybd_event VK_RWIN, 0, &H1, 0keybd_event VK_RWIN, 0, &H2, 0End 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 CLASSBEGIN MultiUse = -1 'TrueENDAttribute VB_Name = "cSendKeys"Attribute VB_GlobalNameSpace = FalseAttribute VB_Creatable = TrueAttribute VB_PredeclaredId = FalseAttribute VB_Exposed = FalseOption ExplicitPublic 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 keyEnd EnumPrivate m_colKeyMap As New CollectionPrivate 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 = &H1Private Const KEYEVENTF_KEYUP = &H2Private Declare Function GetVersion Lib "kernel32" () As LongPrivate Declare Function VkKeyScan Lib "user32" Alias "VkKeyScanA" ( _ ByVal cChar As Byte) As IntegerPrivate Declare Function VkKeyScanW Lib "user32" ( _ ByVal cChar As Integer) As IntegerPrivate 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 <= lLen) Then nextChar = Mid$(sString, iPos + 1, 1) End IfEnd FunctionPublic Sub SendKeys(ByVal sKeys As String, Optional ByVal Wait As Boolean) ' The plus sign (+), caret (^), percent sign (%), ' tilde (~), and parentheses ( ) have special ' meanings to SendKeys ' Brackets ([ ]) have no special meaning to SendKeys, ' but you must enclose them in braces. ' To specify brace characters, use {{} and {}}. ' Repeating keys: {LEFT 42} do left 42 times. ' + = Shift ' ^ = Ctrl ' % = Alt ' ~ = enter ' ( = start sub expression. +(EC) = Shift then E then C On Error GoTo errorHandler Dim sMsg As String Dim lErr As Long Dim iPos As Long Dim iNextPos As Long Dim iLen As Long Dim sChar As String Dim colBrace As New Collection Dim sContent As String Dim sKey As String Dim sCount As String Dim lCount As Long iPos = 1 iLen = Len(sKeys) Do While iPos <= iLen sChar = Mid$(sKeys, iPos, 1) Select Case sChar Case "+", "~", "%" If nextChar(sKeys, iPos, iLen) = "(" Then ' Add to brace stack: colBrace.Add sChar ' send key down Select Case sChar Case "+" KeyDown vbKeyShift Case "~" KeyDown vbKeyControl Case "%" KeyDown vbKeyMenu End Select iPos = iPos + 2 Else ' Key press the key (probably not what you wanted) Select Case sChar Case "+" KeyDown vbKeyShift KeyUp vbKeyShift Case "~" KeyDown vbKeyControl KeyUp vbKeyControl Case "%" KeyDown vbKeyMenu KeyUp vbKeyMenu End Select iPos = iPos + 1 End If Case "~" ' Enter key: KeyDown vbKeyReturn KeyUp vbKeyReturn iPos = iPos + 1 Case ")" If (colBrace.Count > 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 SubEnd SubPublic Sub KeyPress(ByVal sKey As String, Optional ByVal lCount = 1)Dim vKey As KeyCodeConstantsDim 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 SubPublic Sub KeyDown(ByVal vKey As KeyCodeConstants) keybd_event vKey, 0, KEYEVENTF_EXTENDEDKEY, 0End SubPublic Sub KeyUp(ByVal vKey As KeyCodeConstants) keybd_event vKey, 0, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0End SubPublic Function KeyCode(ByVal sChar As String) As KeyCodeConstantsDim bNt As BooleanDim iKeyCode As IntegerDim b() As ByteDim iKey As IntegerDim vKey As KeyCodeConstantsDim 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 FunctionPrivate 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
