Inputbox怎么使用啊?他怎么才能\设置验证吗?输入不正确不进入程序啊

a = InputBox("显示内容", "标题")
If a = "SLore" Then
MsgBox "正确"
Else
MsgBox "错误"
End If

Dim strPass As String, iCount As Integer
iCount = 1
Do
  strPass = InputBox("请输入密码", "登录")
  If strPass = "Leon2" Then
    Exit Do
  Else
    MsgBox "密码不正确!"
    iCount = iCount + 1
    If iCount = 3 Then
      MsgBox "事不过三，对不起，你已经没有登录的机会了!88!"
      End
    End If
  End if
Loop