这个VBA程序如何计算注册码

838225419

Sub Regfile()
    Dim temp
    temp = 88888888
    Dim MyUserName
    MyUserName = GetSetting(appname:="MyApp", section:="Startup", Key:="User")
    RegValue = GetSetting(appname:="MyApp", section:="Startup", Key:="Reg")
    Dim Reg, Serial1, Serial2 As Long
    Serial1 = Abs(Format(CreateObject("Scripting.FileSystemObject").GetDrive("C:").SerialNumber))
    Serial2 = Abs(Format(CreateObject("Scripting.FileSystemObject").GetDrive("D:").SerialNumber))
    Dim serial
    serial = Serial1 + Serial2
    Dim Head, RegCode As String
    Dim head1, head2
    head1 = Left(serial, 1)
    head2 = Right(serial, 1)
    H1 = Array("H", "I", "J", "M", "O", "A", "B", "Z", "K", "L")
    H2 = Array("P", "G", "N", "T", "R", "E", "V", "D", "S", "J")
    head1 = H1(head1)
    head2 = H2(head2)
    Head = head1 & head2
    Reg = Round(Abs(serial + temp) / 3, 0) + serial
    If RegValue = serial + temp Then
        MsgBox "本文件已由" & MyUserName & "注册成功！请放心使用！  ", vbInformation, "注册信息"
        SaveSetting "MyApp", "Startup", "reg2", 1
        Exit Sub
    End If
    Set Dialog = DialogSheets("DH-Register")
    Dialog.DrawingObjects("T1").Text = serial
    Dialog.EditBoxes("D0").Text = ""
    Dialog.EditBoxes("D1").Text = ""
Begin:
    DBBoxOK = Dialog.Show
    If Not DBBoxOK Then
        Exit Sub
    End If
    If Dialog.EditBoxes("D0").Text = "" Then
        MsgBox "请输入用户名！  ", vbExclamation, "错误信息"
        GoTo Begin
    End If
    User = Dialog.EditBoxes("D0").Text
    RegCode = Right(Asc(User), 1) & Head & Format$(Hex$(Asc(User)), "@@") & Mid(Reg, 1, 4) & Mid(Asc(User), 2, 1)
    If Dialog.EditBoxes("D1").Text = "zhangtianhe" Then GoTo superadmin
    If Dialog.EditBoxes("D1").Text <> RegCode Then
        MsgBox "请输入正确的注册码！  ", vbExclamation, "错误信息"
        GoTo Begin
    End If
superadmin:
    Dim reg1, user1
    reg1 = serial + temp
    user1 = User
    SaveSetting "MyApp", "Startup", "Reg", reg1
    SaveSetting "MyApp", "Startup", "User", user1
    MsgBox "恭喜您！已成功注册！  ", vbInformation, "信息"
End Sub