例[9-3].frm

蒋加伏主编VB程序设计第四版PPT及全部课本源码 北京邮电大学出版社 Visual Basic 程序设计教程（第四版） 主编 蒋加伏 张林峰 找了好久的（不带密码的）

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "例［9-3］ 动态菜单乘法和除法"
   ClientHeight    =   3195
   ClientLeft      =   165
   ClientTop       =   735
   ClientWidth     =   3675
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   3675
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text2 
      Height          =   375
      Left            =   1320
      TabIndex        =   2
      Top             =   2160
      Width           =   855
   End
   Begin VB.TextBox Text1 
      Height          =   375
      Left            =   0
      TabIndex        =   0
      Top             =   2160
      Width           =   735
   End
   Begin VB.Label Label3 
      BorderStyle     =   1  'Fixed Single
      Height          =   375
      Left            =   2760
      TabIndex        =   4
      Top             =   2160
      Width           =   735
   End
   Begin VB.Label Label2 
      Caption         =   "="
      Height          =   255
      Left            =   2280
      TabIndex        =   3
      Top             =   2280
      Width           =   375
   End
   Begin VB.Label Label1 
      Height          =   375
      Left            =   960
      TabIndex        =   1
      Top             =   2160
      Width           =   495
   End
   Begin VB.Menu Cal 
      Caption         =   "运算(&C)"
      Begin VB.Menu Add 
         Caption         =   "加法"
         Shortcut        =   ^A
      End
      Begin VB.Menu Sub 
         Caption         =   "减法"
         Shortcut        =   ^S
      End
      Begin VB.Menu appendcal 
         Caption         =   ""
         Index           =   0
         Visible         =   0   'False
      End
   End
   Begin VB.Menu Exit 
      Caption         =   "退出(&X)"
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim AppendCalNo As Integer
Private Sub Add_Click()
  Label1.Caption = "+"
  Label3.Caption = Val(Text1) + Val(Text2)     '显示两数相加的结果
End Sub


Private Sub Sub_Click()
  Label1.Caption = "-"
  Label3.Caption = Val(Text1) - Val(Text2)     '显示两数相减的结果
End Sub
Private Sub Exit_Click()
  End
End Sub

Private Sub Form_Click()
If AppendCalNo = 0 Then
AppendCalNo = AppendCalNo + 1
Load appendcal(AppendCalNo)
appendcal(AppendCalNo).Caption = "乘法"
appendcal(AppendCalNo).Visible = True
AppendCalNo = AppendCalNo + 1
Load appendcal(AppendCalNo)
appendcal(AppendCalNo).Caption = "除法"
appendcal(AppendCalNo).Visible = True
End If
End Sub
Private Sub Form_DblClick()
Dim i As Integer
Do While AppendCalNo > 0
Unload appendcal(AppendCalNo)
AppendCalNo = AppendCalNo - 1
Loop
End Sub

Private Sub AppendCal_Click(Index As Integer)
If Index = 1 Then
Label1.Caption = "×"
Label3.Caption = Val(Text1.Text) * Val(Text2.Text)
End If
If Index = 2 Then
Label1.Caption = "÷"
Label3.Caption = Val(Text1.Text) / Val(Text2.Text)
End If
End Sub