form1.frm

Visual Basic 6 大学教程的代码

VERSION 5.00
Begin VB.Form frmisnumeric 
   Caption         =   "Using IsNumeric, Val and Str$"
   ClientHeight    =   1530
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   1530
   ScaleWidth      =   4680
   StartUpPosition =   3  'Windows Default
   Begin VB.TextBox txtInput 
      Height          =   285
      Left            =   0
      TabIndex        =   2
      Top             =   360
      Width           =   4695
   End
   Begin VB.CommandButton cmdIsNumeric 
      Caption         =   "IsNumeric?"
      Height          =   375
      Left            =   0
      TabIndex        =   1
      Top             =   720
      Width           =   1815
   End
   Begin VB.Label lblOutput 
      Height          =   255
      Left            =   0
      TabIndex        =   3
      Top             =   1200
      Width           =   4695
   End
   Begin VB.Label lblInput 
      Caption         =   "Enter a string"
      Height          =   255
      Left            =   0
      TabIndex        =   0
      Top             =   120
      Width           =   2295
   End
End
Attribute VB_Name = "frmisnumeric"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' Fig. 8.13
' Using IsNumeric, Val and Str$
Option Explicit

Private Sub cmdIsNumeric_Click()
   If IsNumeric(txtInput.Text) Then
      lblOutput.Caption = txtInput.Text & " + 10 is " & _
                          Str$(Val(txtInput.Text) + 10)
   Else
      lblOutput.Caption = txtInput.Text & " is not a number"
   End If
End Sub