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Excel VBA如何设置到期"自毁"保护

  • 2026-04-03 10:46:11
Excel VBA如何设置到期"自毁"保护

今天给大家分享一段纯学习用途的 VBA 代码,实现「工作簿打开自动校验有效期 + 到期自动清理公式+代码"自毁"保护」,适合做临时文件、演示文件、试用版表格的期限保护,代码可直接复制修改使用。

全文只做技术分享、学习交流,不用于任何恶意破坏文件的行为。

一、代码逻辑

  • 打开工作簿时,自动读取 / 写入有效期
  • 实时计算剩余有效天数
  • 到期后自动清除所有公式
  • 自动另存为普通的 xlsx 表格,即代码"自毁"保护
  • 全程无弹窗干扰,逻辑温和,仅做文件功能限制

二、代码部分文件自动校验

打开Excel文件,按 Alt + F11 打开 VBA 编辑器,左侧双击 ThisWorkbook,把下面代码完整粘贴进去:

Private Sub Workbook_Open()    Dim counter%, term As Date, chk, str As String    str = "HAJTCFX"    chk = GetSetting(str, "budget", "使用次数", "")    If chk = "" Then        term = "2026/7/31"        SaveSetting str, "budget", "使用次数", Format(term, "0")  '将值写入注册表    Else        counter = DateDiff("D", Date, Val(chk)) '计算剩余天数        If counter <= 10 And counter >= 0 Then        ElseIf counter < 0 Then            DeleteSetting str, "budget", "使用次数"            killme        End If    End IfEnd Sub
  • str = "HAJTCFX",可自定义根据自己需要命名,用于注册表读写的"应用程序名";

  • term = "2026/7/31",可根据自己需要设置到期日期;

  • 注册表路径地址:计算机\HKEY_CURRENT_USER\SOFTWARE\VB and VBA Program Settings

三、代码部分(自毁子程序)

Public Sub killme()    On Error Resume Next    Dim ss As String    Dim ws As Worksheet    Application.DisplayAlerts = False    ss = FullName    For Each ws In ActiveWorkbook.Worksheets        ws.Cells.SpecialCells(xlCellTypeFormulas).ClearContents    Next ws    ActiveWorkbook.SaveAs Filename:=ThisWorkbook.Path & "\" & Split(ThisWorkbook.Name, ".")(0& ".xlsx", FileFormat:=xlOpenXMLWorkbook, CreateBackup:=False    ThisWorkbook.ChangeFileAccess xlReadOnly    Kill ss    ThisWorkbook.Close FalseEnd Sub
  • 文件名含空格易出错:路径拼接、文件名拆分时会触发代码报错,导致 “自毁” 逻辑执行失败

  • 改系统日期可规避检测:用户只需把电脑系统日期改回有效期内,就能继续使用文件;

  • 对策:针对 "改系统日期" 的问题,可通过注册表记录最后一次操作日期做双重比对

  • 禁用宏直接失效:若用户打开文件时选择 "禁用宏",整个有效期校验逻辑会完全不执行

四、重要提醒(必看)

  • 本文仅做Excel/VBA 技术学习分享,请勿用于恶意删除、破坏他人文件
  • 代码仅清理公式,不会乱删数据,适合自用、演示文件的期限管控
  • 重要文件请先备份,再测试代码
  • 注册表仅存储日期信息,不收集任何隐私数据

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  1. CONNECT:[ UseTime:0.000536s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000744s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000312s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000273s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000540s ]
  6. SELECT * FROM `set` [ RunTime:0.000205s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000534s ]
  8. SELECT * FROM `article` WHERE `id` = 473451 LIMIT 1 [ RunTime:0.000391s ]
  9. UPDATE `article` SET `lasttime` = 1775377586 WHERE `id` = 473451 [ RunTime:0.001978s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000240s ]
  11. SELECT * FROM `article` WHERE `id` < 473451 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000402s ]
  12. SELECT * FROM `article` WHERE `id` > 473451 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000412s ]
  13. SELECT * FROM `article` WHERE `id` < 473451 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000794s ]
  14. SELECT * FROM `article` WHERE `id` < 473451 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000723s ]
  15. SELECT * FROM `article` WHERE `id` < 473451 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001653s ]
0.076227s