Subclass Form : Control Subclass « GUI « VB.Net






Subclass Form

Subclass Form
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports System.ComponentModel
Imports System.Drawing.Drawing2D
Imports System.IO

Public Class MainClass
    
    Shared Sub Main()
        Dim form1 As Form = New Form1

        Application.Run(form1)


    End Sub
End Class




Public Class Form1
    Inherits Ancestor

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.SuspendLayout()
        '
        'Descendent
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 14)
        Me.ClientSize = New System.Drawing.Size(300, 266)
        Me.HeaderText = "HeaderText"
        Me.Name = "Descendent"
        Me.ResumeLayout(False)

    End Sub

#End Region

    ' Do NOT include the Handles keyword!
    Protected Overrides Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        MessageBox.Show("derived")
    End Sub


End Class



Public Class Ancestor
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents Panel1 As System.Windows.Forms.Panel
    Friend WithEvents lblHeader As System.Windows.Forms.Label
    Friend WithEvents cmdNext As System.Windows.Forms.Button
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Panel1 = New System.Windows.Forms.Panel()
        Me.lblHeader = New System.Windows.Forms.Label()
        Me.cmdNext = New System.Windows.Forms.Button()
        Me.GroupBox1 = New System.Windows.Forms.GroupBox()
        Me.Panel1.SuspendLayout()
        Me.SuspendLayout()
        '
        'Panel1
        '
        Me.Panel1.Anchor = ((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right)
        Me.Panel1.BackColor = System.Drawing.Color.White
        Me.Panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
        Me.Panel1.Controls.AddRange(New System.Windows.Forms.Control() {Me.lblHeader})
        Me.Panel1.Location = New System.Drawing.Point(4, 4)
        Me.Panel1.Name = "Panel1"
        Me.Panel1.Size = New System.Drawing.Size(292, 68)
        Me.Panel1.TabIndex = 0
        '
        'lblHeader
        '
        Me.lblHeader.Anchor = ((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right)
        Me.lblHeader.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.lblHeader.Location = New System.Drawing.Point(16, 16)
        Me.lblHeader.Name = "lblHeader"
        Me.lblHeader.Size = New System.Drawing.Size(262, 28)
        Me.lblHeader.TabIndex = 0
        Me.lblHeader.Text = "Header Text"
        '
        'cmdNext
        '
        Me.cmdNext.Anchor = (System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right)
        Me.cmdNext.FlatStyle = System.Windows.Forms.FlatStyle.System
        Me.cmdNext.Location = New System.Drawing.Point(232, 232)
        Me.cmdNext.Name = "cmdNext"
        Me.cmdNext.Size = New System.Drawing.Size(60, 28)
        Me.cmdNext.TabIndex = 1
        Me.cmdNext.Text = "Next"
        '
        'GroupBox1
        '
        Me.GroupBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right)
        Me.GroupBox1.Location = New System.Drawing.Point(8, 224)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(284, 4)
        Me.GroupBox1.TabIndex = 2
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "GroupBox1"
        '
        'Ancestor
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 14)
        Me.ClientSize = New System.Drawing.Size(300, 266)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.GroupBox1, Me.cmdNext, Me.Panel1})
        Me.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Name = "Ancestor"
        Me.Text = "Ancestor"
        Me.Panel1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region

    Protected Overridable Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdNext.Click
    End Sub

    Public Property HeaderText() As String
        Get
            Return lblHeader.Text
        End Get
        Set(ByVal Value As String)
            lblHeader.Text = Value
        End Set
    End Property

    
End Class

           
       








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