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
Object = "{6B7E6392-850A-101B-AFC0-4210102A8DA7}#1.3#0"; "COMCTL32.OCX"
Begin VB.Form Form1 
   Caption         =   "进度条"
   ClientHeight    =   3270
   ClientLeft      =   1845
   ClientTop       =   2280
   ClientWidth     =   7500
   LinkTopic       =   "Form1"
   LockControls    =   -1  'True
   PaletteMode     =   1  'UseZOrder
   ScaleHeight     =   3270
   ScaleWidth      =   7500
   Begin VB.Frame Frame1 
      Caption         =   "状态属性"
      Height          =   1950
      Left            =   600
      TabIndex        =   1
      Top             =   360
      Width           =   6180
      Begin VB.CommandButton cmdExit 
         Caption         =   "退出"
         Height          =   375
         Left            =   240
         TabIndex        =   8
         Top             =   1320
         Width           =   1335
      End
      Begin VB.ComboBox cboAlign 
         Height          =   300
         ItemData        =   "form1.frx":0000
         Left            =   240
         List            =   "form1.frx":000D
         Style           =   2  'Dropdown List
         TabIndex        =   6
         Top             =   360
         Width           =   2415
      End
      Begin VB.TextBox txtMin 
         Height          =   285
         Left            =   4560
         TabIndex        =   5
         Text            =   "txtMin"
         Top             =   840
         Width           =   1335
      End
      Begin VB.TextBox txtMax 
         Height          =   285
         Left            =   4560
         TabIndex        =   4
         Text            =   "txtMax"
         Top             =   360
         Width           =   1335
      End
      Begin VB.CommandButton cmdTestBar 
         Caption         =   "测试"
         Height          =   375
         Left            =   4560
         TabIndex        =   2
         Top             =   1320
         Width           =   1335
      End
      Begin VB.Label Label2 
         AutoSize        =   -1  'True
         Caption         =   "最小值"
         Height          =   180
         Left            =   3240
         TabIndex        =   7
         Top             =   840
         Width           =   540
      End
      Begin VB.Label Label1 
         AutoSize        =   -1  'True
         Caption         =   "最大值"
         Height          =   180
         Left            =   3240
         TabIndex        =   3
         Top             =   360
         Width           =   540
      End
   End
   Begin ComctlLib.ProgressBar prgTestBar 
      Align           =   2  'Align Bottom
      Height          =   405
      Left            =   0
      TabIndex        =   0
      Top             =   2865
      Width           =   7500
      _ExtentX        =   13229
      _ExtentY        =   714
      _Version        =   327682
      Appearance      =   1
   End
End
Attribute VB_Name = "form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Sub CenterFrame()
    Frame1.Move _
    (form1.ScaleWidth / 2) - (Frame1.Width / 2), _
    (form1.ScaleHeight / 2) - (Frame1.Height / 2), _
    Frame1.Width, _
    Frame1.Height
End Sub


Private Sub cboAlign_Click()
    prgTestBar.Align = cboAlign.ListIndex
    
    If prgTestBar.Align = 0 Then
        prgTestBar.Width = Frame1.Width
        prgTestBar.Left = Frame1.Left
        prgTestBar.Top = Frame1.Top + Frame1.Height + 200
    End If
    
End Sub


Private Sub cmdExit_Click()
    Unload form1
    End
End Sub

Private Sub cmdTestBar_Click()
    Dim intBarValue As Integer
    On Error GoTo ErrorHandler
    
    prgTestBar.Min = CInt(txtMin)
    prgTestBar.Max = CInt(txtMax)
    For intBarValue = prgTestBar.Min To prgTestBar.Max
        prgTestBar.Value = intBarValue
        DoEvents
    Next

    prgTestBar.Value = prgTestBar.Min
    Exit Sub

ErrorHandler:
    Select Case Err.Number
        Case Is = 13
            MsgBox "Invalid property value", , App.ProductName
        Case Is = 6
            MsgBox "Property value too large", , App.ProductName
        Case Else
            MsgBox "Maximum value must be greater than Minimum value", , App.ProductName
    End Select
    
    Exit Sub
    
End Sub



Private Sub Form_Load()
    CenterFrame
    '缺省状态值
    txtMin = 0
    txtMax = 100
    cboAlign.ListIndex = 1
End Sub


Private Sub Form_Resize()
    CenterFrame
    cboAlign_Click
End Sub


Private Sub Form_Unload(Cancel As Integer)
    Set form1 = Nothing
End Sub