Imports System.Windows.Forms
public class CheckBoxSelectedState
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
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
Friend WithEvents checkBoxA As System.Windows.Forms.CheckBox
Friend WithEvents checkBoxB As System.Windows.Forms.CheckBox
Friend WithEvents btnStatus As System.Windows.Forms.Button
Friend WithEvents btnEnable As System.Windows.Forms.Button
'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.checkBoxA = New System.Windows.Forms.CheckBox()
Me.checkBoxB = New System.Windows.Forms.CheckBox()
Me.btnStatus = New System.Windows.Forms.Button()
Me.btnEnable = New System.Windows.Forms.Button()
Me.SuspendLayout()
'
'checkBoxA
'
Me.checkBoxA.Checked = True
Me.checkBoxA.CheckState = System.Windows.Forms.CheckState.Checked
Me.checkBoxA.Location = New System.Drawing.Point(48, 72)
Me.checkBoxA.Name = "checkBoxA"
Me.checkBoxA.Size = New System.Drawing.Size(200, 24)
Me.checkBoxA.TabIndex = 0
Me.checkBoxA.Text = "CheckBox A"
'
'checkBoxB
'
Me.checkBoxB.AutoCheck = False
Me.checkBoxB.Checked = True
Me.checkBoxB.CheckState = System.Windows.Forms.CheckState.Indeterminate
Me.checkBoxB.Location = New System.Drawing.Point(48, 120)
Me.checkBoxB.Name = "checkBoxB"
Me.checkBoxB.Size = New System.Drawing.Size(200, 24)
Me.checkBoxB.TabIndex = 1
Me.checkBoxB.Text = "CheckBox B"
Me.checkBoxB.ThreeState = True
'
'btnStatus
'
Me.btnStatus.Anchor = (System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right)
Me.btnStatus.Location = New System.Drawing.Point(56, 192)
Me.btnStatus.Name = "btnStatus"
Me.btnStatus.Size = New System.Drawing.Size(136, 23)
Me.btnStatus.TabIndex = 2
Me.btnStatus.Text = "View Checkbox Status"
'
'btnEnable
'
Me.btnEnable.Anchor = (System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right)
Me.btnEnable.Location = New System.Drawing.Point(224, 192)
Me.btnEnable.Name = "btnEnable"
Me.btnEnable.Size = New System.Drawing.Size(96, 23)
Me.btnEnable.TabIndex = 3
Me.btnEnable.Text = "Enable"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(368, 266)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.btnEnable, Me.btnStatus, Me.checkBoxB, Me.checkBoxA})
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub btnStatus_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles btnStatus.Click
Dim status As String
If checkBoxA.Checked = True Then
status = "checkBoxA is checked. " & ControlChars.Cr
Else
status = "checkBoxA is unchecked. " & ControlChars.Cr
End If
If checkBoxB.ThreeState = True Then
status = status & "checkBoxB's CheckState is " & checkBoxB.CheckState.ToString() & "."
Else
If checkBoxB.Checked = True Then
status = status & "checkBoxB is checked."
Else
status = status & "checkBoxB is unchecked."
End If
End If
MessageBox.Show(status)
End Sub
Private Sub btnEnable_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles btnEnable.Click
checkBoxB.AutoCheck = True
checkBoxB.CheckState = CheckState.Checked
checkBoxB.ThreeState = False
End Sub
End Class
