'VB.Net Example - Showing a Windows Form
'
'(c) Jon Vote 07/2002
'Idioma Software Inc.
'All rights reserved
'
'www.idioma-software.com
'jon@idioma-software.com
'
'Code is presented as is.
'Use at your own risk.
'
'1) Start a new project. Form1 is created by default.
'2) From the menu select Project|Add Windows Form.
'3) Click the Open button.
'4) Form2 should now be added to the project.
'5) Display Form1 by double-clicking the Form1
' icon in the Solution Explorer (normally
' located to the right.)
'6) Press F7 to bring up the code window.
'7) Replace all of the code for Form1 with
' the following:
'VB.Net example
'(c) Jon Vote 07/2002
'All rights reserved.
'Idioma Software Inc.
'www.idioma-software.com
'
'Code may be freely used for development
'purposes only as long as credit is given
'to the author. Unauthorized pulication is prohbited.
'
'Here is one way to display a form in VB.Net
'1) Declare WithEvents a modular variable of type form to display.
'2) Set the varible to Nothing in the Closed event for this variable.
'3) To display the form, first check to see if the variable in
' step 1 is Nothing. If so, set it to a new instance of the form
' and then use the Show (or ShowDialog) method.
'4) If the variable is not Nothing, use the Activate method.
'
Public Class Form1
Inherits System.Windows.Forms.Form
'Declare variable WithEvents as type Form2
Private WithEvents m_frmForm2 As Form2
#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 cmdShowForm As System.Windows.Forms.Button
Friend WithEvents chkModal As System.Windows.Forms.CheckBox
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.cmdShowForm = New System.Windows.Forms.Button()
Me.chkModal = New System.Windows.Forms.CheckBox()
Me.SuspendLayout()
'
'cmdShowForm
'
Me.cmdShowForm.Location = New System.Drawing.Point(10, 18)
Me.cmdShowForm.Name = "cmdShowForm"
Me.cmdShowForm.TabIndex = 0
Me.cmdShowForm.Text = "Show Form"
'
'chkModal
'
Me.chkModal.Location = New System.Drawing.Point(90, 22)
Me.chkModal.Name = "chkModal"
Me.chkModal.Size = New System.Drawing.Size(152, 16)
Me.chkModal.TabIndex = 1
Me.chkModal.Text = "Show modally"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(252, 57)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.chkModal, Me.cmdShowForm})
Me.MaximizeBox = False
Me.Name = "Form1"
Me.Text = "Presented by Idioma Software"
Me.ResumeLayout(False)
End Sub
#End Region
'Set form variable to nothing when Form2 closed.
Private Sub m_frmForm2_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles m_frmForm2.Closed
m_frmForm2 = Nothing
End Sub
'Show the form
Private Sub cmdShowForm_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdShowForm.Click
If m_frmForm2 Is Nothing Then
m_frmForm2 = New Form2()
If chkModal.Checked Then
m_frmForm2.ShowDialog()
Else
m_frmForm2.Show()
End If
Else
m_frmForm2.Activate()
End If
End Sub
End Class