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看到国外一段响应Excel单元格按键事件的代码，在键盘输入内容到单元格时，先拦截信息（PeekMessage），判断是否符合条件（代码的目的是不能输入数字），不符合条件则不传递信息（PostMessage）。而在Excel正常情况下，是需要按了回车键或者移动鼠标到其他位置，单元格才会响应change。
这种实时获取输入内容的方式非常好，在做逐步提示功能时，可以不再使用非常别扭难看的textbox控件。
我的问题是：
我只能用这段代码实时获取顺序输入的内容，但输入过程中把光标移到某个字符，就得不到正确的字符串顺序了。例如：我先在A1单元格输入EXCELHME，然后把光标插到H后面，输入O，得到的字符串是EXCELHMEO，而不是EXCELHOME。请问这个问题怎么解决？请大神出手。
Option Explicit
Private Type POINTAPI
x As Long
y As Long
End Type
Private Type MSG
hwnd As Long
Message As Long
wParam As Long
lParam As Long
time As Long
pt As POINTAPI
End Type
Private Declare Function WaitMessage Lib "user32" () As Long
Private Declare Function PeekMessage Lib "user32" Alias "PeekMessageA" _
(ByRef lpMsg As MSG, ByVal hwnd As Long, _
ByVal wMsgFilterMin As Long, _
ByVal wMsgFilterMax As Long, _
ByVal wRemoveMsg As Long) As Long
Private Declare Function TranslateMessage Lib "user32" _
(ByRef lpMsg As MSG) As Long
Private Declare Function PostMessage Lib "user32" Alias "PostMessageA" _
(ByVal hwnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
lParam As Any) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
(ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long
Private Const WM_KEYDOWN As Long = &H100
Private Const PM_REMOVE As Long = &H1
Private Const WM_CHAR As Long = &H102
Private bExitLoop As Boolean
Sub TrackKeyPressInit()
Dim msgMessage As MSG
Dim bCancel As Boolean
Dim iKeyCode As Integer
Dim lXLhwnd As Long
On Error GoTo errHandler:
Application.EnableCancelKey = xlErrorHandler
'initialize this boolean flag.
bExitLoop = False
'get the app hwnd.
lXLhwnd = FindWindow("XLMAIN", Application.Caption)
Do
WaitMessage
'check for a key press and remove it from the msg queue.
If PeekMessage _
(msgMessage, lXLhwnd, WM_KEYDOWN, WM_KEYDOWN, PM_REMOVE) Then
'strore the virtual key code for later use.
iKeyCode = msgMessage.wParam
'translate the virtual key code into a char msg.
TranslateMessage msgMessage
PeekMessage msgMessage, lXLhwnd, WM_CHAR, _
WM_CHAR, PM_REMOVE
'for some obscure reason, the following
'keys are not trapped inside the event handler
'so we handle them here.
If iKeyCode = vbKeyBack Then SendKeys "{BS}"
If iKeyCode = vbKeyReturn Then SendKeys "{ENTER}"
'assume the cancel argument is False.
bCancel = False
'the VBA RaiseEvent statement does not seem to return ByRef arguments
'so we call a KeyPress routine rather than a propper event handler.
Sheet_KeyPress _
ByVal msgMessage.wParam, ByVal iKeyCode, ByVal Selection, bCancel
'if the key pressed is allowed post it to the application.
If bCancel = False Then
PostMessage _
lXLhwnd, msgMessage.Message, msgMessage.wParam, 0
End If
End If
errHandler:
'allow the processing of other msgs.
DoEvents
Loop Until bExitLoop
End Sub
Sub StopKeyWatch()
'set this boolean flag to exit the above loop.
bExitLoop = True
End Sub
'\\This example illustrates how to catch worksheet
'\\Key strokes in order to prevent entering numeric
'\\characters in the Range "A1:D10" .
Private Sub Sheet_KeyPress(ByVal KeyAscii As Integer, _
ByVal KeyCode As Integer, _
ByVal Target As Range, _
Cancel As Boolean)
Const MSG As String = _
"Numeric Characters are not allowed in" & _
vbNewLine & "the Range: """
Const TITLE As String = "Invalid Entry !"
If Not Intersect(Target, Range("A1:D10")) Is Nothing Then
If Chr(KeyAscii) Like "[0-9]" Then
MsgBox MSG & Range("A1:D10").Address(False, False) _
& """ .", vbCritical, TITLE
Cancel = True
End If
End If
End Sub
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发表于 2018-2-2 20:25
楼主
