Excel保護密碼是用來防止別人修改Excel文檔用的，但有時連自己都忘了，那該怎么辦呢？
破解方法：
打開需要破解的excel文檔，然后按Alt+F11打開VBA編輯器，點擊插入-模塊，在模塊中將以下代碼COPY進去，無需保存，直接按F5運行，等待運行完畢。大約等待2分鐘左右，密碼被計算出來，并且顯示出原密碼，文檔也變成未設密碼狀態。
（注：復制代碼時按下面代碼區域右上角的第二個按鈕。）
Public Sub AllInternalPasswords()' Breaks worksheet and workbook structure passwords. Bob McCormick' probably originator of base code algorithm modified for coverage' of workbook structure / windows passwords and for multiple passwords'' Norman Harker and JE McGimpsey 27-Dec-2002 (Version 1.1)' Modified 2003-Apr-04 by JEM: All msgs to constants, and' eliminate one Exit Sub (Version 1.1.1)' Reveals hashed passwords NOT original passwordsConst DBLSPACE As String = vbNewLine & vbNewLineConst AUTHORS As String = DBLSPACE & vbNewLine & _"Adapted from Bob McCormick base code by" & _"Norman Harker and JE McGimpsey"Const HEADER As String = "AllInternalPasswords User Message"Const VERSION As String = DBLSPACE & "Version 1.1.1 2003-Apr-04"Const REPBACK As String = DBLSPACE & "Please report failure " & _"to the microsoft.public.excel.programming newsgroup."Const ALLCLEAR As String = DBLSPACE & "The workbook should " & _"now be free of all password protection, so make sure you:" & _DBLSPACE & "SAVE IT NOW!" & DBLSPACE & "and also" & _DBLSPACE & "BACKUP!, BACKUP!!, BACKUP!!!" & _DBLSPACE & "Also, remember that the password was " & _"put there for a reason. Don't stuff up crucial formulas " & _"or data." & DBLSPACE & "Access and use of some data " & _"may be an offense. If in doubt, don't."Const MSGNOPWORDS1 As String = "There were no passwords on " & _"sheets, or workbook structure or windows." & AUTHORS & VERSIONConst MSGNOPWORDS2 As String = "There was no protection to " & _"workbook structure or windows." & DBLSPACE & _"Proceeding to unprotect sheets." & AUTHORS & VERSIONConst MSGTAKETIME As String = "After pressing OK button this " & _"will take some time." & DBLSPACE & "Amount of time " & _"depends on how many different passwords, the " & _"passwords, and your computer's specification." & DBLSPACE & _"Just be patient! Make me a coffee!" & AUTHORS & VERSIONConst MSGPWORDFOUND1 As String = "You had a Worksheet " & _"Structure or Windows Password set." & DBLSPACE & _"The password found was: " & DBLSPACE & "$$" & DBLSPACE & _"Note it down for potential future use in other workbooks by " & _"the same person who set this password." & DBLSPACE & _"Now to check and clear other passwords." & AUTHORS & VERSIONConst MSGPWORDFOUND2 As String = "You had a Worksheet " & _"password set." & DBLSPACE & "The password found was: " & _DBLSPACE & "$$" & DBLSPACE & "Note it down for potential " & _"future use in other workbooks by same person who " & _"set this password." & DBLSPACE & "Now to check and clear " & _"other passwords." & AUTHORS & VERSIONConst MSGONLYONE As String = "Only structure / windows " & _"protected with the password that was just found." & _ALLCLEAR & AUTHORS & VERSION & REPBACKDim w1 As Worksheet, w2 As WorksheetDim i As Integer, j As Integer, k As Integer, l As IntegerDim m As Integer, n As Integer, i1 As Integer, i2 As IntegerDim i3 As Integer, i4 As Integer, i5 As Integer, i6 As IntegerDim PWord1 As StringDim ShTag As Boolean, WinTag As BooleanApplication.ScreenUpdating = FalseWith ActiveWorkbookWinTag = .ProtectStructure Or .ProtectWindowsEnd WithShTag = FalseFor Each w1 In WorksheetsShTag = ShTag Or w1.ProtectContentsNext w1If Not ShTag And Not WinTag ThenMsgBox MSGNOPWORDS1, vbInformation, HEADERExit SubEnd IfMsgBox MSGTAKETIME, vbInformation, HEADERIf Not WinTag ThenMsgBox MSGNOPWORDS2, vbInformation, HEADERElseOn Error Resume NextDo 'dummy do loopFor i = 65 To 66: For j = 65 To 66: For k = 65 To 66For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126With ActiveWorkbook.Unprotect Chr(i) & Chr(j) & Chr(k) & _Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)If .ProtectStructure = False And _.ProtectWindows = False ThenPWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)MsgBox Application.Substitute(MSGPWORDFOUND1, _"$$", PWord1), vbInformation, HEADERExit Do 'Bypass all for...nextsEnd IfEnd WithNext: Next: Next: Next: Next: NextNext: Next: Next: Next: Next: NextLoop Until TrueOn Error GoTo 0End IfIf WinTag And Not ShTag ThenMsgBox MSGONLYONE, vbInformation, HEADERExit SubEnd IfOn Error Resume NextFor Each w1 In Worksheets'Attempt clearance with PWord1w1.Unprotect PWord1Next w1On Error GoTo 0ShTag = FalseFor Each w1 In Worksheets'Checks for all clear ShTag triggered to 1 if not.ShTag = ShTag Or w1.ProtectContentsNext w1If ShTag ThenFor Each w1 In WorksheetsWith w1If .ProtectContents ThenOn Error Resume NextDo 'Dummy do loopFor i = 65 To 66: For j = 65 To 66: For k = 65 To 66For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126.Unprotect Chr(i) & Chr(j) & Chr(k) & _Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)If Not .ProtectContents ThenPWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)MsgBox Application.Substitute(MSGPWORDFOUND2, _"$$", PWord1), vbInformation, HEADER'leverage finding Pword by trying on other sheetsFor Each w2 In Worksheetsw2.Unprotect PWord1Next w2Exit Do 'Bypass all for...nextsEnd IfNext: Next: Next: Next: Next: NextNext: Next: Next: Next: Next: NextLoop Until TrueOn Error GoTo 0End IfEnd WithNext w1End IfMsgBox ALLCLEAR & AUTHORS & VERSION & REPBACK, vbInformation, HEADEREnd Sub破解如此簡單。有了這個方法，那Excel文檔保護功能就是形同虛設。
【測試使用Excel2003版本，通過?！?/p>
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