VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Demonstrating class CTree"
   ClientHeight    =   2460
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   3495
   LinkTopic       =   "Form1"
   ScaleHeight     =   2460
   ScaleWidth      =   3495
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton cmdInsert 
      Caption         =   "Insert"
      Height          =   285
      Left            =   1800
      TabIndex        =   3
      Top             =   240
      Width           =   1695
   End
   Begin VB.CommandButton cmdTraversals 
      Caption         =   "Do traversals"
      Height          =   285
      Left            =   900
      TabIndex        =   2
      Top             =   600
      Width           =   1695
   End
   Begin VB.TextBox txtInput 
      Height          =   285
      Left            =   0
      TabIndex        =   0
      Top             =   240
      Width           =   1695
   End
   Begin VB.Label lblPostorder 
      Caption         =   "The postorder traversal is:"
      Height          =   255
      Left            =   0
      TabIndex        =   9
      Top             =   1920
      Width           =   3375
   End
   Begin VB.Label lblPostorderResult 
      Height          =   255
      Left            =   0
      TabIndex        =   8
      Top             =   2160
      Width           =   3495
   End
   Begin VB.Label lblPreorder 
      Caption         =   "The preorder traversal is:"
      Height          =   255
      Left            =   0
      TabIndex        =   7
      Top             =   1440
      Width           =   3375
   End
   Begin VB.Label lblPreorderResult 
      Height          =   255
      Left            =   0
      TabIndex        =   6
      Top             =   1680
      Width           =   3495
   End
   Begin VB.Label lblInorderResult 
      Height          =   255
      Left            =   0
      TabIndex        =   5
      Top             =   1200
      Width           =   3495
   End
   Begin VB.Label lblInorder 
      Caption         =   "The inorder traversal is:"
      Height          =   255
      Left            =   0
      TabIndex        =   4
      Top             =   960
      Width           =   3375
   End
   Begin VB.Label lblInput 
      Caption         =   "Enter value to insert"
      Height          =   255
      Left            =   0
      TabIndex        =   1
      Top             =   0
      Width           =   2655
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' Fig. 21.15
' Demonstrating class CTree
Option Explicit
Dim mTree As New CTree

Private Sub cmdInsert_Click()
   mTree.InsertNode (Val(txtInput.Text))
End Sub

Private Sub cmdTraversals_Click()
   Call mTree.InorderTraversal
   lblInorderResult.Caption = mTree.Output
   Call mTree.PreorderTraversal
   lblPreorderResult.Caption = mTree.Output
   Call mTree.PostorderTraversal
   lblPostorderResult.Caption = mTree.Output
End Sub