VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   5670
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   5670
   ScaleWidth      =   4680
   StartUpPosition =   3  '系統預設值
   Begin VB.CommandButton Command1 
      Caption         =   "計算"
      Height          =   735
      Left            =   3000
      TabIndex        =   3
      Top             =   1320
      Width           =   1335
   End
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "微軟正黑體"
         Size            =   15.75
         Charset         =   136
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   735
      Left            =   120
      TabIndex        =   1
      Text            =   "n"
      Top             =   1320
      Width           =   735
   End
   Begin VB.Label Label2 
      BeginProperty Font 
         Name            =   "微軟正黑體"
         Size            =   15.75
         Charset         =   136
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   735
      Left            =   960
      TabIndex        =   2
      Top             =   1320
      Width           =   1695
   End
   Begin VB.Label Label1 
      Caption         =   "已知n，計算1*2+2*3...+n*(n+1)"
      BeginProperty Font 
         Name            =   "微軟正黑體"
         Size            =   14.25
         Charset         =   136
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   855
      Left            =   240
      TabIndex        =   0
      Top             =   240
      Width           =   3855
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
n = Val(Text1.Text)

For i = 1 To n
    a = i * (i + 1)
    s = s + a
Next

Label2.Caption = s
End Sub