form1.frm

此程序用于记录上次的开机的时间.VB编程,比较简单.

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   1  '所有者中心
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   375
      Left            =   600
      TabIndex        =   0
      Top             =   2160
      Width           =   2175
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      Caption         =   "Label1"
      Height          =   180
      Left            =   600
      TabIndex        =   1
      Top             =   840
      Width           =   540
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Private Sub Command1_Click()
    Dim TimeCalc As Date
        TimeCalc = Timer
    Label1.Caption = "希望本计算机让您使用愉快！！！"

'计数控制
    Do While Timer - TimeCalc < 1
        DoEvents
    Loop

    Unload Me


End Sub

Private Sub Form_Load()
    
Dim Today As Date
Dim DayString As String
Dim PathString As String
Dim DateRec As Integer
Command1.Caption = "退出"

    Today = Now     '保存当前系统日期及时间
    PathString = App.Path
    If Right(PathString, 1) <> "\" Then
        PathString = PathString + "\"
    End If
    If Dir(PathString + "StartPcTime.log") <> "" Then
        DateRec = FreeFile      '系统自动生成程序中没有使用的文件号并赋值给变量 DateRec
        Open PathString + "StartPcTime.log" For Input As #DateRec   '以输入方式打文件号DateRec的文件，以便从该文件中读取内容
        Line Input #DateRec, DayString          '从已打开记录号DateRec的文件中顺序读取一行完整的记录，并保存在变量DayString中。
        Close #DateRec

        Label1.Caption = "你上次开机的时间是[" & DayString & "]"
    Else
        Label1.Caption = "你是第一次使用本计算机！！！"
    End If

    DateRec = FreeFile  '重新分配未使用过的文件号，并赋给DataRec变量
    Open PathString + "StartPcTime.log" For Output As #DateRec      'Output 表示从内存输出到指定文件

    DayString = Today   '将已赋值为当前系统日期及时间的变量Today再次赋给DayString变量
    'Print #DateRec, DayString   '将变量DayString的内容写入（print#，注：Print的对象是什么 ）文件号为DateRec的变量
    Write #DateRec, DayString

    Close #DateRec


    
End Sub