例4.frm

在VB5环境下开发的VB程序集,窗体控件源代码.

VERSION 5.00
Begin VB.Form FRM8_6_5 
   Caption         =   "例4: Sub(传值)"
   ClientHeight    =   3090
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   4680
   BeginProperty Font 
      Name            =   "宋体"
      Size            =   14.25
      Charset         =   134
      Weight          =   400
      Underline       =   0   'False
      Italic          =   0   'False
      Strikethrough   =   0   'False
   EndProperty
   LinkTopic       =   "Form1"
   ScaleHeight     =   3090
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "计算圆面积"
      Height          =   735
      Left            =   960
      TabIndex        =   0
      Top             =   360
      Width           =   2655
   End
End
Attribute VB_Name = "FRM8_6_5"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim S As Single
Private Sub Command1_Click()
  Bj = InputBox("请输入园的半径！")
  Call Cir_Area(Bj)
  MsgBox ("半径为" & Bj & ",圆面积为" & S)
  End Sub

Sub Cir_Area(ByVal r)   '传值调用
  S = 3.14159 * r ^ 2
  r = 1000   ' 在子程序中改变形参的值，不会影响到实参
End Sub