form1.frm

Visual Basic 6 大学教程的代码

VERSION 5.00
Begin VB.Form frmStringCompare 
   Caption         =   "Comparing strings with StrComp"
   ClientHeight    =   2790
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   2790
   ScaleWidth      =   4680
   StartUpPosition =   3  'Windows Default
   Begin VB.ListBox lstOutput 
      Height          =   645
      Left            =   0
      TabIndex        =   6
      Top             =   2160
      Width           =   4695
   End
   Begin VB.TextBox txtInput2 
      Height          =   285
      Left            =   0
      TabIndex        =   4
      Top             =   960
      Width           =   4695
   End
   Begin VB.TextBox txtInput1 
      Height          =   285
      Left            =   0
      TabIndex        =   2
      Top             =   360
      Width           =   4695
   End
   Begin VB.CommandButton cmdCompare 
      Caption         =   "Compare"
      Height          =   375
      Left            =   0
      TabIndex        =   1
      Top             =   1320
      Width           =   1815
   End
   Begin VB.Label lblOutput 
      Height          =   255
      Left            =   0
      TabIndex        =   5
      Top             =   1800
      Width           =   4695
   End
   Begin VB.Label lblInput2 
      Caption         =   "Enter second string"
      Height          =   255
      Left            =   0
      TabIndex        =   3
      Top             =   720
      Width           =   2415
   End
   Begin VB.Label lblInput1 
      Caption         =   "Enter first string"
      Height          =   255
      Left            =   0
      TabIndex        =   0
      Top             =   120
      Width           =   2295
   End
End
Attribute VB_Name = "frmStringCompare"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' Fig. 8.1
' Comparing strings with StrComp,
' relational and equality operators
Option Explicit

Private Sub cmdCompare_Click()
   Dim result As Integer
   
   result = StrComp(txtInput1.Text, txtInput2.Text)
   
   If result = -1 Then
      lblOutput.Caption = _
         "The first string is less than the second string"
   ElseIf result = 1 Then
      lblOutput.Caption = _
         "The first string is greater than the second string"
   Else
      lblOutput.Caption = "The strings are equal"
   End If
   
   Call lstOutput.Clear
   
   If txtInput1.Text = txtInput2.Text Then
      Call lstOutput.AddItem(txtInput1.Text & " is equal to " & _
                             txtInput2.Text)
   End If

   If txtInput1.Text <> txtInput2.Text Then
      Call lstOutput.AddItem(txtInput1.Text & _
                             " is not equal to " & txtInput2.Text)
   End If

   If txtInput1.Text < txtInput2.Text Then
      Call lstOutput.AddItem(txtInput1.Text & _
                             " is less than " & txtInput2.Text)
   End If

   If txtInput1.Text > txtInput2.Text Then
      Call lstOutput.AddItem(txtInput1.Text & _
                             " is greater than " & txtInput2.Text)
   End If

   If txtInput1.Text <= txtInput2.Text Then
      Call lstOutput.AddItem(txtInput1.Text & _
                             " is less than or equal to " & _
                             txtInput2.Text)
   End If
   
   If txtInput1.Text >= txtInput2.Text Then
      Call lstOutput.AddItem(txtInput1.Text & _
                           " is greater than or equal to " & _
                           txtInput2.Text)
   End If
   
End Sub