Excel文件保护，忘记密码
实测有效：
1、右键sheet，点击查看代码
2、输入下列代码
Sub DeletePW()

ActiveSheet.Protect DrawingObjects:=True, Contents:=True, AllowFiltering:=True

ActiveSheet.Protect DrawingObjects:=False, Contents:=True, AllowFiltering:=True

ActiveSheet.Protect DrawingObjects:=True, Contents:=True, AllowFiltering:=True

ActiveSheet.Protect DrawingObjects:=False, Contents:=True, AllowFiltering:=True

ActiveSheet.Unprotect

End Sub
3、点击执行
4、完成