Excel保护密码是用来防止别人修改Excel文档用的，但有时连自己都忘了，那该怎么办呢？
破解方法：
打开需要破解的excel文档，然后按Alt+F11打开VBA编辑器，点击插入-模块，在模块中将以下代码COPY进去，无需保存，直接按F5运行，等待运行完毕。大约等待2分钟左右，密码被计算出来，并且显示出原密码，文档也变成未设密码状态。
（注：复制代码时按下面代码区域右上角的第二个按钮。）
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. Dont stuff up crucial formulas " & _"or data." & DBLSPACE & "Access and use of some data " & _"may be an offense. If in doubt, dont."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 computers 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, _"$$", PWord1), vbInformation, HEADERExit Do Bypass all for...nextsEnd IfEnd WithNext: Next: Next: Next: Next: NextNext: Next: Next: Next: Next: NextLoop Until TrueOn Error GoTo 0End IfIf WinTag And Not ShTag ThenMsgBox MSGONLYONE, vbInformation, HEADERExit SubEnd IfOn Error Resume NextFor Each w1 In WorksheetsAttempt clearance with PWord1w1.Unprotect PWord1Next w1On Error GoTo 0ShTag = FalseFor Each w1 In WorksheetsChecks for all clear ShTag triggered to 1 if not.ShTag = ShTag Or w1.ProtectContentsNext w1If ShTag ThenFor Each w1 In WorksheetsWith w1If .ProtectContents ThenOn Error Resume NextDo Dummy do loopFor i = 65 To 66: For j = 65 To 66: For k = 65 To 66For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126.Unprotect Chr(i) & Chr(j) & Chr(k) & _Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)If Not .ProtectContents ThenPWord1 = Chr(i) & Chr(j) & Chr(k) & Chr(l) & _Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)MsgBox Application.Substitute(MSGPWORDFOUND2, _"$$", PWord1), vbInformation, HEADERleverage 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破解如此简单。有了这个方法，那Excel文档保护功能就是形同虚设。
【测试使用Excel2003版本，通过。】
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