form1.frm

这里有很多很实用的VB编程案例,方便大家学习VB.

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "窗体居中"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "退出"
      Height          =   495
      Left            =   1800
      TabIndex        =   0
      Top             =   1320
      Width           =   1215
   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 Const SPI_GETWORKAREA = 48
Private Declare Function SystemParametersInfo& Lib "User32" Alias _
"SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, _
lpvParam As Any, ByVal fuWinIni As Long)
Private Type RECT
    Left As Long
    Top As Long
    Right As Long
    Bottom As Long
End Type

Public Function CenterForm32(frm As Form)
Dim ScreenWidth&, ScreenHeight&, ScreenLeft&, ScreenTop&
Dim DesktopArea As RECT
Call SystemParametersInfo(SPI_GETWORKAREA, 0, DesktopArea, 0)
ScreenHeight = (DesktopArea.Bottom - DesktopArea.Top) * Screen.TwipsPerPixelY
ScreenWidth = (DesktopArea.Right - DesktopArea.Left) * Screen.TwipsPerPixelX
ScreenLeft = DesktopArea.Left * Screen.TwipsPerPixelX
ScreenTop = DesktopArea.Top * Screen.TwipsPerPixelY
frm.Move (ScreenWidth - frm.Width) \ 2 + ScreenLeft, _
(ScreenHeight - frm.Height) \ 2 + ScreenTop
End Function

Private Sub Command1_Click()
    End
End Sub

Private Sub Form_Load()
    CenterForm32 Me
End Sub