VERSION 5.00
Begin VB.Form frmLogin 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "登錄"
   ClientHeight    =   1530
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   3990
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   ScaleHeight     =   1530
   ScaleWidth      =   3990
   StartUpPosition =   2  '屏幕中心
   Begin VB.CommandButton cmdCancel 
      Caption         =   "取消"
      Height          =   375
      Left            =   2520
      TabIndex        =   3
      Top             =   1080
      Width           =   975
   End
   Begin VB.CommandButton cmdOk 
      Caption         =   "登錄"
      Default         =   -1  'True
      Height          =   375
      Left            =   720
      TabIndex        =   2
      Top             =   1080
      Width           =   975
   End
   Begin VB.TextBox txtPassword 
      Height          =   300
      IMEMode         =   3  'DISABLE
      Left            =   1320
      PasswordChar    =   "*"
      TabIndex        =   1
      Top             =   600
      Width           =   2415
   End
   Begin VB.TextBox txtUserName 
      Height          =   300
      Left            =   1320
      TabIndex        =   0
      Top             =   240
      Width           =   2415
   End
   Begin VB.Label Label2 
      Caption         =   "密碼"
      Height          =   255
      Left            =   480
      TabIndex        =   5
      Top             =   645
      Width           =   735
   End
   Begin VB.Label Label1 
      Caption         =   "用戶名"
      Height          =   255
      Left            =   480
      TabIndex        =   4
      Top             =   285
      Width           =   855
   End
End
Attribute VB_Name = "frmLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private LoginSucceeded As Boolean           '記錄是否登錄成功


Private Sub cmdCancel_Click()
    '設置全局變量為 false
    '不提示失敗的登錄
    LoginSucceeded = False
    Unload Me
End Sub

Private Sub cmdOK_Click()
    
    userName = txtUsername.Text         '全局變量：記錄當前用戶的用戶名
    userPassword = txtPassword.Text     '全局變量：記錄當前用戶的密碼
    '檢查正確的密碼
    '在此處要從數據庫中檢索是否有這個用戶，以及密碼是否正確
    cn.Open
    Set rs = New ADODB.Recordset
    Set rs.ActiveConnection = cn
    rs.LockType = adLockReadOnly
    rs.CursorType = adOpenForwardOnly
    
    rs.Open "select * from 用戶密碼表 where 用戶名 = '" & userName & "' and 密碼 = '" & userPassword & "'"
    If rs.EOF Then
        LoginSucceeded = False
    Else
        userXingMing = rs!姓名          '全局變量：記錄當前用戶的姓名
        LoginSucceeded = True
    End If
   
    If LoginSucceeded = False Then
        '程序執行到此，說明一定沒有登錄成功
        MsgBox "無效的用戶名或密碼，請重試!", , "登錄"
        txtUsername.SetFocus
        txtPassword.Text = ""
        SendKeys "{Home}+{End}"
    Else
        Me.Hide
    End If
    rs.Close
    cn.Close
    If LoginSucceeded = True Then
        Unload Me
        frmMain.Show
    End If
End Sub

Private Sub Form_Activate()
    txtUsername.Text = ""
    txtPassword.Text = ""
    txtUsername.SetFocus
    
    Set cn = New ADODB.Connection
    cn.ConnectionString = connectString
End Sub

Private Sub Form_Load()
    LoginSucceeded = False
End Sub