form1.frm

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VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3090
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3090
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   WindowState     =   2  'Maximized
   Begin VB.TextBox Text1 
      Height          =   615
      Left            =   840
      TabIndex        =   0
      Text            =   "Text1"
      Top             =   600
      Width           =   2055
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
'声明API函数

Private Sub Form_Load()
Dim l As Long
     '遍历所有的窗口
     l = EnumWindows(AddressOf EnumWindowsProc, 0) '将所有窗口最小化
Dim rtn
Move (Screen.Width - Width) \ 2, (Screen.Height - Height) \ 2
'使窗体在程序运行后处于屏幕中心
rtn = SetWindowPos(Form1.hwnd, -1, 0, 0, 0, 0, 3)
'如果将上面语句中的-1改为-2则取消窗体总在最前面
End Sub

Private Sub Text1_KeyPress(KeyAscii As Integer)
    If KeyAscii = "13" Then    '用来代替回车键
        Dim js As String
        Dim ht As String
        mima = "cfan"    '设置密码为cfan
        If Text1.Text = mima Then
            End    '如果密码则正确退出
        Else
            MsgBox "密码错误", vbOKOnly, "提示"    '如果密码错误则弹出提示窗口
        End If
    End If
End Sub