改标题（块if）.frm

Visual Basic课程举例1 有很好的例题

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Form_Click()
       Static Index As Integer
       Index = Index + 1
       If Index = 1 Then
           Form1.Caption = "复制操作"
       ElseIf Index = 2 Then
           Form1.Caption = "剪切操作"
       ElseIf Index = 3 Then
           Form1.Caption = "粘贴操作"
       ElseIf Index = 4 Then
            Form1.Caption = "清除操作"
           Index = 0
       Else
           Index = 0
       End If
End Sub