我很难实现重要的功能，需要在复制时从办公室剪贴板中清除数据。
目的不是与其他办公室程序共享内容，例如单词，powerpoint等。场景是我在excel表中有一些重要的内容。一旦我复制了它，很快就可以在办公室剪贴板上找到它。如果我继续复制excel中的东西，它会继续收集其他办公程序。但是，Windows剪贴板只包含最近可以使用
清除的输入System.Windows.Forms.Clipboard.clear():
是否有办法清除办公室剪贴板？
我用Google搜索并发现可能没有明确的解决方案，但是应该可以在FindWindowEx（....）的帮助下获取办公室剪贴板窗口，然后可以发送消息以便清除内容。似乎我无法这样做。
有人可以告诉他们是否遇到过同样的问题吗？
答案 0 :(得分：0)
这可能会让你在正确的方向上轻推......来自：mrexcel.com
Option Explicit
Sub myClr()
'Put this sub inta a Sheet Module, like: Sheet1.
Call ClearOfficeClipboard
End Sub
'Put the code from here down into a Standard Module, like Module1.
Private Declare Function FindWindowEx Lib "user32.dll" _
Alias "FindWindowExA" (ByVal hWnd1 As Long, _
ByVal hWnd2 As Long, ByVal lpsz1 As String, _
ByVal lpsz2 As String) As Long
Private Declare Function PostMessage Lib "user32.dll" Alias _
"PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, _
ByVal wParam As Long, ByVal lParam As Long) As Long
Private Const WM_LBUTTONDOWN As Long = &H201&
Private Const WM_LBUTTONUP As Long = &H202&
'creates a long variable out of two words
Private Function MakeLong(ByVal nLoWord As Integer, ByVal nHiWord As Integer) As Long
MakeLong = nHiWord * 65536 + nLoWord
End Function
Sub ClearOfficeClipboard()
Dim hMain&, hExcel2&, hWindow&, hParent&
Static sTask As String
'****Dim hClip As Long************************'changed by Lary
Dim octl, bScreenUpdatingIsOn As Boolean
Static lParameter As Long, bNotFirstVisibleTime As Boolean, hClip As Long, bNotFirstTime As Boolean
If Not (bNotFirstTime) Then
lParameter = MakeLong(120, 18)
sTask = Application.CommandBars("Task Pane").NameLocal
'Handle for XLMAIN
hMain = Application.hwnd
bNotFirstTime = True
End If
With Application.CommandBars("Task Pane")
If Not .Visible Then
'assume have to force the window if it is not visible, since it appears that
' the window class does not remain loaded if you clear a non-visible clipboard
'determine current status of screenupdating so that this sub does not change it
bScreenUpdatingIsOn = Application.ScreenUpdating
If bScreenUpdatingIsOn Then Application.ScreenUpdating = False
Set octl = Application.CommandBars(1).FindControl(ID:=809, recursive:=True)
If Not octl Is Nothing Then octl.Execute
.Visible = False
'return to screenupdating on if that is what it was in the beginning
If bScreenUpdatingIsOn Then Application.ScreenUpdating = True
If hClip = 0 Then
hParent = hMain: hWindow = 0
hWindow = FindWindowEx(hParent, hWindow, "MsoWorkPane", vbNullString)
If hWindow Then
hParent = hWindow: hWindow = 0
hClip = FindWindowEx(hParent, hWindow, "bosa_sdm_XL9", vbNullString)
End If
End If
Else
If Not (bNotFirstVisibleTime) Then** 'find hClip if window is visible
Do
hExcel2 = FindWindowEx(hMain, hExcel2, "EXCEL2", vbNullString)
hParent = hExcel2: hWindow = 0
hWindow = FindWindowEx(hParent, hWindow, "MsoCommandBar", sTask)
If hWindow Then
hParent = hWindow: hWindow = 0
hWindow = FindWindowEx(hParent, hWindow, "MsoWorkPane", vbNullString)
If hWindow Then
hParent = hWindow: hWindow = 0
hClip = FindWindowEx(hParent, hWindow, "bosa_sdm_XL9", vbNullString)
If hClip > 0 Then
Exit Do
End If
End If
End If
Loop While hExcel2 > 0
bNotFirstVisibleTime = True
End If
End If
End With
If hClip = 0 Then
MsgBox "Cant find Clipboard window"
Exit Sub
End If
Call PostMessage(hClip, WM_LBUTTONDOWN, 0&, lParameter)
Call PostMessage(hClip, WM_LBUTTONUP, 0&, lParameter)
End Sub
答案 1 :(得分：0)
以下代码已在vb.net中针对Excel 2013进行了自定义。只需在功能区中添加一个按钮，代码就像魅力一样。
Private Const WM_LBUTTONDOWN As Long = &H201&
Private Const WM_LBUTTONUP As Long = &H202&
WithEvents oAppWD As Excel.Application
Public oDoc As Excel.Workbook
Private Declare Sub Sleep Lib "kernel32.dll" (ByVal dwMilliseconds As Int32)
Private Declare Function FindWindowEx Lib "user32.dll" Alias "FindWindowExA" (ByVal hWnd1 As Int32, ByVal hWnd2 As Int32, ByVal lpsz1 As String, ByVal lpsz2 As String) As Int32
Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Int32
Private Declare Function PostMessage Lib "user32.dll" Alias "PostMessageA" (ByVal hWnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As Int32) As Int32
Declare Function BringWindowToTop Lib "user32" (ByVal hWnd As Int32) As Int32
Private Sub Button1_Click(sender As Object, e As RibbonControlEventArgs) Handles Button1.Click
Dim hMain As Int32, hWord As Int32, hClip As Int32, hWindow As Int32, hParent As Int32
Dim lParameter As Int32
Dim sTask As String
Dim HWND As Int32
'Open the selected File
oAppWD = Globals.ThisAddIn.Application 'DirectCast(System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application"), Excel.Application)
oAppWD.Visible = True
oDoc = oAppWD.ActiveWorkbook
oDoc.Activate()
oDoc.Windows(1).Activate()
Sleep(2000)
' MessageBox.Show("Doing it.....")
HWND = FindWindow("XLMAIN", vbNullString)
' Make Office Clipboard Visible
oAppWD.CommandBars("Office Clipboard").Visible = True
BringWindowToTop(HWND)
' Get the handles of the respective Windows Of the Office
sTask = "Office Clipboard"
hMain = HWND
hWord = FindWindowEx(hMain, 0, "EXCEL2", vbNullString)
hParent = hWord : hWindow = 0
hWindow = FindWindowEx(hParent, 0, "MsoCommandBar", sTask)
If hWindow Then
hParent = hWindow : hWindow = 0
hWindow = FindWindowEx(hParent, 0, "MsoWorkPane", vbNullString)
If hWindow Then
hParent = hWindow : hWindow = 0
hClip = FindWindowEx(hParent, 0, vbNullString, "Collect and Paste 2.0")
End If
End If
If hClip = 0 Then
MsgBox("Cant find Clipboard window")
Exit Sub
End If
' Pass the message 120,18 are the respective co-ordinates of the Clear all button.
lParameter = MakeLong(120, 18)
' Send the Message
Call PostMessage(hClip, WM_LBUTTONDOWN, 0&, lParameter)
Call PostMessage(hClip, WM_LBUTTONUP, 0&, lParameter)
Sleep(100)
End Sub
Private Function MakeLong(ByVal nLoWord As Integer, ByVal nHiWord As Integer) As Int32
MakeLong = nHiWord * 65536 + nLoWord
End Function