自动关闭消息框.frm

Windows API函数,希望大伙有用哦

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   2145
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   6645
   LinkTopic       =   "Form1"
   ScaleHeight     =   2145
   ScaleWidth      =   6645
   StartUpPosition =   3  '窗口缺省
   Begin VB.Timer Timer1 
      Left            =   90
      Top             =   90
   End
   Begin VB.CommandButton Command1 
      Caption         =   "关闭消息框"
      Height          =   345
      Left            =   4890
      TabIndex        =   0
      Top             =   1560
      Width           =   1395
   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 FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const WM_CLOSE = &H10
Private Const MsgTitle As String = "提示信息"
Private Sub Command1_Click()
  Timer1.Interval = 3000
  Timer1.Enabled = True
    MsgBox "若您不回应的话，3 秒后此消息框将自动关闭  ！  ", vbInformation, MsgTitle
End Sub
Private Sub Timer1_Timer()
Dim hWnd As Long
  Timer1.Enabled = False
  hWnd = FindWindow(vbNullString, MsgTitle)
  SendMessage hWnd, WM_CLOSE, 0, ByVal 0&
End Sub