Dim ReValue As Date 声明时间变量 Dim name As String 声明字符串变量,软件名称 Dim dd As Variant 声明数值变量,dd为日期差 name = "gggg" 给变量赋值软件名为gggg ReValue = GetSetting(name, "MainKey", "DateValue", Date) 读取注册表软件名gggg的键值,百考试题提示如果没有则为当前日期 Me.Text1 = ReValue dd = DateDiff("d", ReValue, Date) 计算日期差 Me.Text2 = dd If dd = 0 Then 如果是第一天运行 SaveSetting name, "MainKey", "dateValue", Date 写注册表 End If If dd >. 30 Then MsgBox "软件已过期" Else MsgBox "软件可以试用" DoCmd Quit MsgBox "还剩下" &. 30 - dd &. "天试用期!"